I bought both this diffuser and another similar device (aka portable) that cost literally one-third the price. Neither of them work GREAT frankly; but this much more expensive one is no better than the cheap one.It's also clear that somebody went to great lengths to design this product; but their result is a frustrating set of failures.• the packaging was a disaster. I literally couldn't get it off. I had to rip it apart like a 7 year old boy opening a box of breakfast cereal.• the box that the thing came in, with the hinged lid, wouldn't shut again. Extra maddening because it's quite evident that some designer somewhere is feeling really proud of themselves for how "cool" this box that they came up with is. {eye roll}• it's really super hard to open the lid of the device and then to get it to shut properly again. I spill the water inside of it at least half the time.• the charging station is FAR from intuitive. I spent 5 minutes trying to figure out how the prongs on the device fit with the charging pad on the base; only to finally figure out that it doesn't matter. You just plop the thing down any old place and it works. UGH!! Again - some designer is soooooo proud of themselves; but the result is a thing that utterly lacks function in practice.• the "fill line" is impossible to read. Why would you put it on the outside of the water tank?? Again, these designers - too cute by half.And then the biggee - I can hardly smell anything out of it when I finally do get it to turn on. I have 2 plug-in diffusers (from another company) that work much better; so I know how this type of device SHOULD work.Fuggettaboutit. Return.