I purchased this unit maybe a year ago. I tried using it for a couple of months and then finally gave up on it. Now it's in a box somewhere completely unused.The fit was uncomfortable. I tried both ears and different adjustments to the over-ear-loop, but no matter what, the part behind the ear started to hurt my ear within an hour. Not only was it too uncomfortable to wear around, it wasn't that easy to put on either. So if I wanted to wear it just for the duration of the call, I would try to put it on when the phone rang. However it took too long and I'd answer the call on the phone, then have to switch to the bluetooth device, which is annoying.The sound quality for me was okay. I could hear the other party fine. However, they routinely complained of being unable to hear me. It didn't seem to be a volume problem, but that the sound was breaking up or had static. So, after fumbling to get the darned thing on and switching sound to the bluetooth, i'd end up having to switch it back to the phone when I got tired of repeating myself.