I've owned these for a little over a year now and use them constantly when I'm working around the house or in the garage. I've dipped my toes into audiophile gear and have listened to a wide variety of nice headphones and speakers. My favorite wired over ears are my DT990 Pros. I've also listened to my brother's Sony XM4 headphones and I'll be comparing them to the Senn's throughout the review as the prices are similar.SOUND: (8/10)For bluetooth headphones, they are beautifully balanced and easy to listen to for long periods of time. They have the classic flat Sennheiser sound signature with a slight emphasis on bass. This is the one category where they handily beat the Sony XM4 headphones. Soundstage is average on both as the shallow earcups and closed back design make these feel much more closed-in feeling than my open back DT990s. Both cans or lightyears ahead of Beats or Airpods, but the detail on the Senn's is noticeably better to my ears. If you like lots of bass, the Sony's are a better fit for you.BLUETOOTH: (8/10)I'm currently using these with my iPad and Oneplus 7T and I really love how it can connect to both at the same time. If I start using the other device, it switches quickly and mutes the other device. Range is dependent on the device you have the connected to, and I'd consider it plenty good. I can walk all the way downstairs and into the garage while leaving the iPad upstairs and it always continues playing without a hiccup. As soon as I start walking down the driveway it'll begin cutting out. If you're in the same room as your laptop or phone, I'm certain you could freely walk around without any bluetooth glitches.CONTROLS: (6/10)There are only two buttons on the back right earcup. One button powers them on/off and enables pairing mode. The other is a 3 function switch which is responsible for every other function, such as play/pause, track forward/backward, volume and answering calls. This switch works, but it has poor tactile feedback when pressed and trying to go backward one song is a pain. It's serviceable but other headphones (such as the Sony XM4s) do it much better by integrating multifunction touch controls into the side of the earcups.FEATURES: (4/10)They include a nice soft case and special aux plug if you want to use them as standard headphones without noise cancelling. This is great as they won't become totally useless when the battery eventually craps out. However, there's no means of tweaking the sound or noise cancelling. If you don't like how they sound out of the box, you're stuck with it. With the Sony XM4s, you can adjust the sound and noise cancelling to your liking through their app. Plus, there's no transparency mode, which is a huge pain if you need to quickly take a listen to your environment. Further, they don't have ear proximity sensors, so when you take them off, the music will keep playing indefinitely. Also, they don't have USB type C like the Sony's, which is a huge bummer for the price. In addition, Sennheiser has no app integration at all with these and there are no firmware updates to fix some of the problems I've talked about.NOISE CANCELLATION: (5/10)The Sony's absolutely spank the Sennheiser's in this department. While they're good at dealing with humming or higher pitched noises like vacuums and air conditioners, they're terrible with loud pops and low rumble noises. Further, these will drive you nuts if you plan to jog with them as the noise cancelling peaks really loud every time you take a step. Low rumble noises actually get AMPLIFIED buy the noise cancelling. The Sony and Bose's ANC is lightyears ahead and is very difficult to overwhelm even with really loud sounds like snare drums. If noise cancellation is a big deal to you, don't even consider the Sennheisers.CONSTRUCTION/BUILD QUALITY: (8/10)Other than the chintzy controls, the overall construction is excellent and very sturdy. I've chucked these around in a variety of harsh environments and they still look and feel great. They're definitely nicer feeling than the XM4s. Additionally, the exposed cables between the headband will make them easier to fix should a channel start cutting out.CALL QUALITY: (8/10)I haven't personally listened to a recording from these, but everyone I've talked to on the phone with these said it sounds very clear, even in noisier environments. Really, this is all that matters as you wouldn't use these for any professional voice recording scecnarios.COMFORT: (7/10)They're nicely sized and shaped to fit comfortably over average sized ears. Like any well-engineered pair of cans, the earcups can tilt a few degrees in every direction to give a good seal. However, if you have much larger ears, they will probably dig into the driver grille which could get uncomfortable. The earpads on the Sennheiser are nicer, but the headband on the XM4s is more comfortable. That said, I have a giant head and have no trouble wearing these for hours on end. The only downside is the leather earpads which can get sweaty if you're exerting yourself. The Sony's are no different here.BATTERY LIFE: (9/10)These seem to run for ages, I can go a week at at time before it warns me they need to be recharged. I haven't tested the Sony's enough to compare. I can safely say it's plenty of runtime for 99% of people out there, even with the volume cranked. No true wireless earbuds will even come close to the runtime of the Sonys or Sennheisers. My only criticism is the lack of wear detection as I constantly forget to turn them off and they will stay on until the battery goes dead, even with no sound playing. The Sony's resolve this issue with a wear detection sensor in the left earcup, so once you take them off they'll pause the music and eventually shut off if left unattended for several minutes.OVERALL: (7/10)I definitely don't regret purchasing them, as a balanced sound signature was exactly what I was looking for at the time. That said, I can say that the Sony's are a better value for your money. These are definitely overpriced given the feature-set. Frankly, it's shocking they haven't dropped the price to the sub-$200 mark. Try them both if you get the opportunity, as everyone has their own preference in sound. What really holds these back is the lack of updates or adjustability in the software. There are situations where I'd love to turn off the ANC while staying in wireless mode, and they just don't give you the option. Sony continues to update their wireless headphones, adding features and fixing bugs. I'll keep using them until they eventually die or I feel the desire to lighten my wallet. As far as bluetooth headphones go, the only ones you'll find with a nicer sound signature are the Airpods Max, which are more than double the price.I am a professional musician who does a fair amount of travel. My main considerations in choosing a pair of headphones were sound quality & noise cancellation. I tested the Bose, Sennheiser, & Sony — paying particular attention to those two parameters. Here is what I found:N O I S E C A N C E L L A T I O NBOSE: These have the best noise cancellation by far. One of the tests I did was to turn on a vacuum cleaner beside me and listen to the differences. Bose’s ability to cancel the sound is quite amazing. All that was left was a whisper. I also turned on the dryer in an adjoining room. With the Bose, all that I heard was the click of the buttons on the drum.SENN: The Senns do a pretty good job of canceling sound. What’s left from the vacuum test contains more mid-range noise than with the Bose. The annoyance factor is cut way down, but Sennheiser is clearly not trying to equal Bose in this regard. With the dryer test, I could still hear the machine, though greatly reduced, and the quiet sound of the clothes.SONY: The Sonys are about equal to the Senns in the vacuum test, but the spectrum of what’s left is different: Whereas the Senns let pass a fairly neutral midrange, the Sonys pass a smaller spectrum focused in the high-midrange. They bested the Senns in the dryer test, almost equalling the Bose: Most of the machine sound was gone, but more of the upper-mid sounds of the clothes remained.VERDICT: For cancellation the Bose are the clear winners. The Senns are the weakest in this regard, and the Sonys about in between. One thing must be noted here: Only the Sonys have the capability of running Bluetooth without NC. This is an advantage in that NC causes a slight amount of hiss — and the Sony’s hiss is just slightly more apparent than that of the other two to these old ears. Turning off NC does not otherwise affect the sound.S O U N D Q U A L I T YBOSE: Of the three, the Bose offer the least pleasing sound — which is not to say that it’s bad. The sound is very clear and tight, but it’s also kind of brittle — a little too pristine and bright. In passive wired mode, this effect is mitigated and the sound is somewhat warmer.SENN: Here is where the Sennheisers excel. Of the three, these sound the most like an audiophile headset. Whereas the other two tend to flatten the sound, the Senns have a lovely transparency. They have the richest spectrum, such that you can really hear the subtle raspy timbre of a voice or the expressive nuance of a bass tone. The sound is even slightly more luscious in passive wired mode.SONY: The Sonys fall about in the middle between the two, although this may be a matter of taste. They offer a truly beautiful, warm sound — clear like the Bose but without the brittleness; warm like the Senns but with less detail. In passive wired mode, the tendency toward a bass-forward EQ is accentuated.VERDICT: If sound quality is the most important factor, then the Bose are not in the running as far as Bluetooth performance is concerned: the other two are a significant notch above. Those who prefer a transparent, detailed sound will prefer the Senns. Those who prefer a warm, focused, bass-forward sound will prefer the Sonys. If wired mode will be a significant use, then the Bose can be considered at least in the same league, with the Senns setting the standard.L O O K & F E E LBOSE: A nice feature is the pivoting earpieces, which make them the most comfortable to hang around the neck. These headphones put the least pressure on the head, and the pads are very comfortable. All controls are on the right ear. The on/off/pair button is well-designed and satisfying. The Silicon-Valley Generic voice gives a percentage of charge on boot-up.SENN: These have a kind of vintage look to them. They offer a bit more pressure on the head than do the Bose, but the leather pads are luxurious. The volume/pause/skip button is an elegant design feature. The voice on boot-up does not give a charge percentage, but the lovely British accent almost makes up for it.SONY: These are some sharp-looking pieces! I got the teal-colored ones and they’re stunning. Pause/skip and volume are nicely separated on the right side, with on/off/pair on the left. They provide the most pressure on the head, with nicely-finished pads. The boot-up voice gives a high/medium/low accounting of charge. While not as sensuous as the Senn’s Brit, the Sony’s Midwest Professional voice is more refined than the Bose’s.VERDICT: The Bose are the most comfortable, the Senns have the most elegant volume/pause/skip control, and the Sonys are by far most fun as a fashion accessory.S U M M A R YThese are all well-designed headphones. Not one of them is better in every way; rather each offers a solution that makes different trade-offs. The Bose favor NC. The Senns favor sound quality. The Sonys offer a kind of compromise between these two, while adding the NC-off option and a fashion-forward look. You can’t go wrong with any of them, but the optimum choice will depend on the user’s priorities.S P E C I A L N O T E T O M U S I C I A N SThe third test I did was to play soprano & tenor saxophone with NC on and no incoming audio, as one of my intended uses is to cut a few dBs off the volume while practicing. All three headsets function better in this regard than do custom in-ear passive hearing protectors, as the ear canal is not blocked. The Senns let through the most natural sound by far. The Sonys are a slightly better at reducing the highs, but the resulting sound is a bit hard-edged. The Bose cut down the overall dBs the most, but the result is a downright tinny sound.As a wearer of glasses, I always find comfort problems after a while, with all headphones I have tried over the years. The wire frame around the ears being pressured by the headphones' ear surrounds eventually becomes uncomfortable. The more than decent amount of foam padding around the ears on this model make them the best I've come across so far.The sound quality of this model is superb, and even a deaf old so=and-so like me can appreciate the subtleties of the music.I have yet to wear them in a noisy environment so cannot comment on the efficiency of the noise cancellation.The battery life is also very good - a full charge lasts longer than I can comfortably keep the 'phones on for!Bluetooth range depends on where you are. In a normal house I'd say about 20 feet, through walls.Pairing is straightforward and easy.The feature that allows you to have a voice tell you how much battery life is left is a plus point.The multi-function toggle for volume, stop/start/ff/rewind etc takes a bit of getting used to but doesn't take long to become second nature.Drawbacks:The wire for a hard connection is way too short, at around a metre. Luckily I have an extension lead already. Also, at this price, one would expect a full size headphone jack to 3.5mm jack convertor plug, as most hi-fis' headphone sockets are the full size version. Luckily I already had one of those too!The annoying voice telling you that you have lost connection every 10 seconds is unnecessary. Just the once would have been sufficient, as I think most folk could work that out for themselves!As my KS manhatten headphones were getting a bit old i was in the market for some New headphones with a Budget of £200.I went to Currys and tried various Including Boses soundlink2s which had a good sound but lacked base and volume but very comfortable and Beats solo3s which are a great fashion statement and had better base and volume but lacked middle and treble and felt a bit tight on my head. .i looked on line to find Sennheisers Momentum 2.0.After watching many of the YT reviews i hit the buy button and they arrived a day later.My personal opinion of those phones are they look great ,top quality and well made and comfortable but no way of switching of the noise cancelling.When wearing those phones indoors thats not an issue, but walking down a busy road i want to hear the sound of traffic for safety reasons.i will give those headphones 4 stars out of 5.I researched, read reviews, Bose, Sony etc etc. In the end I went for the Sennheiser Momentum 2. Now I'm no expert in headphones, but I love listening to music from my heroes, Pink Floyd to Little Big Town. If you doubt the performance of these cans, listen to a track called "Wilderness" by Explosions in the Sky, it's mindblowingly good. Incredible sound and clarity. I just can't praise these Sennheisers enough. They are fantastic.good stuff. The sound quality is very good, although I would not say it is much better than the old wired Momentum 1 on-ear headphones - it's basically the same to my non-audiophilic ear, yet these headphones are a bit more comfortable to wear. Wireless makes the most difference from Momentum 1 for me, noise cancelling in the plane still leaves some substantial noise on the background (however, I've not compared with other manufacturer's headphones, perhaps it's up to the competition). Design is best in class imo.In the end I decided that the sound quality, though good, was not worth the £230. Wireless and noise cancelling, also good, did not warrant the £100 extra over the wired version. Incidentally noise cancelling should read noise reduction. None of the, so called, noise cancelling headphones do anything more than reduce the outside noise.