Updated: Less than a year inI finally started experiencing the dreaded double click when single clicking. It happens just enough to cause me grief at times. Definitely my last Logitech mouse as they seem very prone to this. After spending $$ on the mouse and wireless pad, this mouse ended up costing a good chunk to not even last a year. I do like the comfort with the wireless. Buyer beware.Updated: 5 months laterWhile this mouse is about the same as all Logitech mice I've ever owned (more than I can recall), it ends up about the same as every one of them. It is extremely prone to gathering crude on the bottom side of the mouse. More so than any others I've owned (Razer, Steel, several other brands). It is as if they think the underside of the mouse should be pretty, with different designs and indents. My cat likes to use my mouse pad as her resting spot and dogs are flying around with plenty of hair in the breeze. I think about all of it collects under this mouse better than my air purifier. I'm constantly having to clean it since it grabs everything due to poor underside smoothness. Maybe if I used it in a sterile environment?Otherwise, the charging, along with Logitech's charge pad, has been working great. It stays charged between 85 and 95%. I worked around the changing DPI when the mouse sleeps by setting up an offline profile on the mouse that matched my normal DPI usage. Then turned off the offline mode. It appears that when the mouse sleeps, it defaults to the offline DPI, so you get that pause of difference each time you start using the mouse.Probably my last attempt with Logitech. I'll probably try replacing the feet and maybe just smearing some silicon across the bottom parts to see if I can reduce it's pickup of hair and stuff.Original:I've owned too many Logitech mice to count over the years - other G502 models, G500 and on. For many years, the G500 was my go to. I think they stopped making it because, well, you apparently just have to keep changing things so you can market something different. At any rate, my last G502 Proteus suffered the same fate of many mice today where the clicker stopped functioning correctly, which of course kind of defeats the purpose of the mouse. This G502 Lightspeed is basically the same mouse as far as I can tell. Maybe a little better tracking, although I never had issues with mice that did half what the advertised tracking is today on these.I had switched over and tried Razor, Steel and a few other with little to no success. They were either made of cheap parts (plastic/glue that eventually smudged all over) or had similar click issue. Since no company seems capable of producing quality products in 2021, I went back to Logitech.If you like a bigger size mouse that has weight to it, this is your mouse. After trying other mice that were smaller and 2/3 of less the weight of this mouse, I realized that long term use of a small, light mouse isn't for me. My hand would cramp and my forearm would ache. I also missed the thumb holder of all things.There are still some flaws in the design of this mouse. I don't know what kind of thumb you should be born with to use all the buttons correctly. If you palm the mouse, you need a thumb long as a finger to easily reach the front thumb buttons. If you claw grip, you need to bend your thumb backwards since you're over shooting the back buttons. You get used to shifting your hand around on it, although it makes for awkward motion and unsteady handling of the mouse when you're trying to be precise. The other buttons are about what you'd expect - feel the same as any other Logitech mouse I've owned.The mouse wheel is a mixed bag. I like the grip they used on it as other mice often have some texture that doesn't feel that good for the finger. You can switch from free spin to the notched spin where you get tactical feel as you scroll. The free spin is nice, although it's a little too free. I thought I remembered prior versions not being as loose. In any software where you could go scroll happy, the free spin may spin when you don't expect it to or you can accidentally spin a bit as you reposition your fingers for that dang thumb button. I've ended up keep the tactical feel spin set, which is ok.Given it's a wireless mouse, I opted for the PowerPlay wireless pad to go with it. The downside, if you like a really heavy mouse, is that in order to work with PowerPlay, you have to take the weights out for the charging battery. That seems like yet another big oversight. I personally don't need the weights in it, so it didn't bother me one way or the other.Without PowerPlay and the lights turned off, I was getting around 60 to 80 hours of charge. Kind of an odd range, although I'm guessing it just depended on how long it sat there in sleep mode when I wasn't using it. With the LEDs turned on, that dropped down closer to 30 to 40 hours. That's still pretty good. I'm not sure why you have lights on a mouse to begin with because, well, your hand is generally on it and you can't see those lights. I guess if you want fancy lights when you're not at your desk, it works ok.With PowerPlay, the mouse stays charged and I seem to stay somewhere between 80 and 90% charge almost always. It appears to drain down and then charge up a bit to not wear out the battery. The two devices together are exactly what I was hoping for - a wireless mouse that didn't have a cord dragging around and a charger that didn't require me to remember to charge up every time I turned around. I'd highly recommend the pad to go with this.One fault I've had with most Logitech and other brands is the textured grips and especially the multiple designs on the bottom of the mice. All those indentations are dirt magnets. Sure, they look nice. Maybe they add to the handling of the mouse in some small degree. Maybe it looks nicer than a smooth, plain surface. I'd gladly trade whatever advantages for a completely smooth, easy to clean mouse though. My cat thinks my mouse pad is a bed and the mouse itself a pillow, so I constantly have hair and just whatever body oils come off my hands onto the mouse over time. Cleaning is such a pain and when any hair or residue gets on the under side of the mouse, you'll notice it tracking oddly. I'm not a slob by any means - I'd have issues here regardless of wild vermin roaming the house.Lastly is the software. Everything you have anymore wants to install some crap in your system tray. And from what I can tell, that software is what reminds your mouse what DPI you have it set to. So while the software works ok and I've not crashed or seen any issues out of it, the one thing that I have noticed is that the mouse goes to sleep after a few minutes and soon as you start moving it instantly wakes up. There is a bit of lag between when the mouse wakes and the software sees it back alive. So the mouse is working instantly, although the DPI of the mouse is the factory default and not the custom setting. So there's this short bit of time where your DPI isn't what you think it is. Once the software realizes the mouse is awake, it tells it to change and things are good once again. Just annoying that they don't appear to save the settings on the mouse itself. Setup is a bit confusing at times with all the options, so I could have missed it.Overall, the mouse works just like I expected. I was a little disappointed that this was almost a clone to the mouse I owned 5 or 6 years, although I like that mouse a lot, so that's ok. I'm pretty sure the wheel may be a little bit of downgrade and the sound of the clicks is a bit loud compared to some. It is very comfortable though and it felt like coming home after a couple days use. Being wireless, I'm about as happy as I could probably be, so I'd recommend this mouse to anyone looking for a wireless, heavier side, large mouse.If using in conjunction with Logitech's Poweplay charging pad you have to sacrifice the inluded 4gram weights to fit the charging puck. Would have been nice to know this beforehand and with some additional design thought on Logitech's part this limitation could have been avoided. I like a heavier mouse so that was a bummer for me.Scroll wheel feels looser and cheaper than G502 gen 1 mouse I replaced this with and noticably rattles moreso than gen 1 mouse when the clutch is disengaged. Same complaint I have with G502 Hero wired gen 2 mouse I also own. When clutch is disengaged you can marvel at how your web browser's or some game's scroll function will start going crazy at random times unless you re-engage the clutch again. Minor complaint since the free scroll wheel feature is why I have three of these mice, but it's noticably worse on gen 2+ models.LED logo on mouse is neat, but pointless since you only see it when your not using it. For those of you who want a mouse with led bling, this ain't the mouse for you. No change on this from gen to gen. Powerplay pad has the same light up logo that can sync to same color pattern using GHub software. Would have been nice for the pad to have LED around the base like Razr does especially for the price. Wireless charging of the mouse with Powerplay pad works great, so very happy in that regard.My favorite feature is the mouse DPI response time. If you need lightning fast movement, this is the mouse for you! My lord it's responsive at high DPI settings. It's unusuable at max settings in my opinion, but some people out there will probably love it. It's even better that it's wireless so no more snags on the cord when playing FPS!Overall really love the mouse and highly recommend even with it's flaws and quirks.I was looking for a high DPI mouse to use with my work laptop to crate a full "wireless" desktop at home.I've been using gaming mice for work for years as I can't stand mice with "average" DPI tracking speeds. I like my mice to be super sensitive so that I barely have to move my hand to move the mouse pointer across the whole desktop and even across multiple monitors.Since I am using this with my work computer that I am not allowed to install random software on it was important to me that the mouse allowed the DPI speed setting to be changed with physical buttons on the mouse. Many gaming mice only allow you to adjust the DPI settings via the companion software which wasn't an option for me on my work computer. This mouse has buttons right on the side that let you adjust the DPI speed between several presets right out of the box, no software needed. You can use the software to further refine exactly what DPI each setting will switch to, but I just set the mouse on the maximum setting using the buttons so I don't care about tweaking it further with the software.I also had tried a Bluetooth gaming mouse from Razer previously, but I found that for whatever reason the Bluetooth connection to Windows was not very reliable and I would often lose connectivity to the mouse. Using the Logitech USB receiver has been flawless and the mouse is just as responsive as my previous wired mice were. The receiver is a standard USB plug, so I'll probably have to get a USB C converter at some point when I get a new computer, but that's not a big deal.On the bottom of the mouse there are two removable panels. Then circular panel reveals a storage area for the tiny USB receiver, and also has spots for two weights on the cover itself. The larger panel has spots for additional weights. I am using all of the included weights as I actually weighed my previous Logitech wired mouse with the weights I was used to and found that adding all of the weights that are included with this mouse make it the exact same weight as my previous wired mouse. I like the mouse to have some heft to it and adding all the weights gets me that. If you like a lighter mouse you can just leave the weights out or adjust them however you like.Another interesting default setting on the mouse is that there is a small button that your thumb can press which will reduce the mouse DPI to the lowest setting while you hold the button down. This is particularly nice if you are like me and use the mouse on the highest setting as you can always push down this button if you need to do any very precise movements such as hovering over a very thin edge of a window to resize it or make minute adjustments when doing image editing, etc.There are a few quirks which are a little annoying, but nothing that would make me want to stop using this mouse.First, the mouse has colored LEDs inside of it as per all the usual gaming devices of today. By default the colors constantly cycle. You can use the Logitech software to setup the light patterns and lights however you like, but if you aren't using the software you are stuck with the default constant cycling. I even installed the software on my personal computer in the hope that any settings I made would be retained when I switched over to my work computer, but sadly the settings reset to the default after a short time if the mouse isn't connected to a computer with the software installed. So I just have to live with the color changing mouse... which isn't a big deal but I was hoping I might be able to get a little better battery life out of it if I turned off the lights.The other quirk is the battery life. I definitely cannot get a full week of work out of this mouse without recharging it. Using Bluetooth would give much longer battery life but it's worth the trade off to me to have the reliable and fast connection using the Logitech wireless adapter. The mouse will show its current battery level via the DPI indicator lights when you first wake it up, and will flash a red light when it is getting low. It uses a braided USB cable for charging and also for connecting it to your computer in wired mode if you like. I've actually just setup the cable to a regular USB charger so whenever the mouse gets low I simply plug in the cable and continue to use it in wireless mode while it charges just from the power source. I leave the cable wrapped around the bottom of my monitor so it's easy to access if I happen to run out of battery power at a bad time, and the cable is long enough to basically just feel like I've switched back to a wired mouse temporarily while it's charging.Overall I think this is the best wireless high DPI mouse you can find, especially if you want one that has all the DPI adjustments right on the mouse itself and doesn't require software.I ordered this mouse instead of the G Pro Wireless because I have a g502 Proteus which has lasted me years without issue and been the most comfortable mouse I've owned since my old mx518.The Lightspeed version feels slightly lighter than the wired version and the scroll wheel has less heft, but otherwise it feels identical and the lightspeed low latency tech Logitech is using is really incredible. Macro support is great, and although the G hub software is still less user friendly than the old Logi Gaming Software, I was very impressed with the new mouse and ready to replace my wired g502. So... why two stars?Within a couple days of owning it, maybe 5 hours of usage total, I noticed that the left button would sometimes double click when I pressed it once. It's now doing this for ~50% of the presses and it makes the mouse utterly unusable. I've tried turning it on and off, running it in wired mode, resetting the profiles and reinstalling the software and nothing has worked so far. I reached out to Logitech support for an RMA and they haven't replied yet. If I get a working replacement I'll update this review, but now I'm worried about reliability with this mouse in a way that I've never been about a Logitech product before. There are multiple complaints about this same issue elsewhere so I can't recommend this mouse for now. I was so ready to go wireless too...Edit:Received an RMA replacement from Logitech after a lengthy and convoluted process where I had to send a video of the mouse double clicking so that they would send me a replacement without shipping back the broken one. The replacement mouse was great for about 3 months, but now the right mouse button registration "flickers" on and off when it's held down. This is obviously terrible for any FPS where you need to hold to ADS and I've had to switch back to my old Proteus again.Now I have two useless $200 wireless mice and after requesting another RMA, they now want me to record myself destroying the replacement with a power tool before they'll send me another one. At this point, I'd really just like a refund. I really wish I could recommend this product, but until Logitech gets a new switch supplier I do not recommend ever buying one of their new gaming mice.I really wanted to keep the mouse... but in less than a week, left single clicks often registered as double-clicks. This is a common issue with new Logitech gaming mouse. Coming from a G903 that also had double-clicking issues, this is a big disappointment.Everything else is great with the mouse, I have the original G502 and loved it.Battery is terrible, built in and about 24 hours of usable life. The software to set it up is really bad and unituitive - the g502 wired software was better.WHY THE CRAP CAN'T I SAVE MY MACROS TO ONBOARD MEMORY? This was why I bought an upgrade, to take it between machines. But my macro's only work with the LG software running. This is useless, and a HUGE downgrade from the 502 wired which CAN save macro's to the mouse.Very dissappointed I spent 200$ on this basically useless mouse.Mac users beware. The first week using this mouse was terrible. G hub software is buggy and sometimes doesn't even detect my mouse. Today was the final stray, the application won't even load and I uninstalled it and reinstalled it three times, and reset my laptop. Does Logitech patch their software regularly? Now I have to go all day without a mouse. Moreover, the design and feel of the mouse does NOT live up to the hype or the price. Returning this subpar mouse ASAP. Save your money.UPDATE: 2 MONTHS IN DOUBLE CLICKING ON THE LEFT AND NO CLICKING ON THE RIGHT.contacted logitech support, no one is willing to help, finally one guy asks for proof of double clicking, however they needed a video... after several video uploads it was not acceptable to logitech support as the mouse serial number was not visible in the video while im clicking the mouse and keeping the camera also focused on the screen!!!!!.LONG STORY SHORT LOGITECH REFUSES TO REPLACE OR REPAIR THE MOUSE. EVEN WITH RECEIPT PROOF OF PURCHASE. OPEN 4 TICKETS AND NO ONE WILL FIX IT.BEEN A LONG TIME LOGITECH FAN, YOU JUST LOST ME OVER A $200.00 MOUSE THAT IS FILLED WITH BUGS AND BADLY MADE. SHAME ON YOU..Had the logitech G903 and wanted an upgrade as that mouse is now 2 years old and still working perfectly. purchased this mouse and it really does take some getting used to as the shape is different.Pros...amazing connectivity, never disconnected...feels great in my hand once i got used to it...dedicated dpi buttons are great...dedicated battery level button saves me time from having to open logitech center to check battery level.I LOVE that you can store the dongle in the mouse.love the scroll wheel and the ability to unlock it for faster scrolling.Cons...sent mouse back twice for replacement, first one the sensor was bad and it caused the cursor to bounce around allthe time. second unit same issue. third unit PERFECT. it might have been a bad batch of sensors! who knows!the feet on it are a bit too low... i bought replacement feet for it and now it glides PERFECTLY...the logitech crappy software no longer allows for mouse pad configuration so you cant adjust the software with the mouse pad surface you use.Battery life is nowhere near the amazing battery life of my g903. its still ok but not great at all... i do have to charge it ever 2 days (8hours use a day).finally the trigger button on the side, i dont like the placement of it... i keep hitting it when i dont mean to.finally if i had a choice of any other mouse i would still pick this one... its comfortable and reliable.