I tried to research this item fully prior to buying it, and found a great many reviewers who did not like it because it was not holding up to strenuous workouts or did not plug into their ears sufficiently well to hear every little nuance of sound.TO HECK WITH ALL OF THEM! This is a well designed, incredibly techie item that works quite well and sounds better than most of the wired or infrared headphones I have ever owned. Set up and synching with my computer and MP3 phone was trouble free and it works every bit as well as you would expect a Motorola product to.Once you turn it on, it re-synchs with my phone and the music starts playing on it's own without any further action from me. All of the controls are on the headset, so you never have to touch another item of equipment.It is true that should you talk to someone on your cell phone using this headset it will sound like you are at the bottom of a well, but every Bluetooth headset I have had or tried so far pretty much does that anyway.So get this thing for the music, don't worry about cell phone call quality because you probably won't use it that much for call anhoo, and remember not to take it in the pool with you. A whole 'nother story.Worth every penny.*** Update 4/2013: Have used this for several years now and it is still working just fine. I saw the comments a couple of folks have left, and still cannot figure out why others are having so much trouble. Use it, get it sweaty, and wipe it down when you are done with it. What's the problem?