I needed new headphones, .ones I could wear at the gym. I decided to get Bluetooth ones because working out with headphones tethered to my audio source — my cell phone — was awkward. I was skeptical of a BT device, though, because my previous experience persuaded me that the technology really wasn't ready for prime time — too many dropped connections and needing to re-pair, plus unstable volume, etc.Anyway, I am very glad I got these. No problems (so far) with pairing and maintaining the connection. And the audio is excellent in my opinion. Between the controls on my phone and the controls on the headphones themselves, I have more volume at my fingertips than I need. Now, most of my listening is to podcasts, but the little bit of music I've listened to sounded fine. The noise cancelling effect of these 'phones is not 100%, but that's OK. They cut out or drastically minimize most of the ambient noise at the gym, including the annoying music playing over the gym's speakers.I'm also impressed with how long they hold a charge. After 3 hours at the gym they are still going strong. I also take them on my daily 2-hour walks and have no worries that they will cut out during that time. I do like the fact that they come with a cable I can use in the event the BT drops.Their range is surprising, too. Once I left my phone at one of the weight machines and got all the way to my car before I realized I didn't have it, because the sound in the headphones was still strong and stable.Some of the features seem like overkill, in that I will probably never use them, but whatever ... some people may appreciate them. I'm thinking of the FM radio and the memory card slot. I just don't see myself fiddling with all the tiny controls to get anything out of them.They are pretty comfortable, too, up to a point. I find that after a couple of hours I feel one or both cups pressing too hard against my skull, but adjusting them usually helps ameliorate this. They're on the bulky side compared to what most others at my gym are wearing, but I could never get used to earbuds or anything less than full headphones; the bud-type things keep falling out of my ear canals.Despite my minor nitpicks, I give these 5 stars. They are better than what I dared hope, and for a reasonable price.