I have owned this unit about three weeks now. I got this unit at a close out price, and I feel that I definitely got my money's worth. I have never owned a Blue-tooth head set before so I have nothing to compare it to. I read reviews on the Internet and decided that this was the unit I wanted in my price range. The sound is clear and intelligible on both ends,... as far as I can tell, even in the car, which is what I bought it for...(to use while driving)... and it is fairly comfortable for about 2 hours of ware, but after that becomes somewhat uncomfortable. I think with some adjustment it may be possible to make it feel even more comfortable, a lot of comfort depends on your own sensitivity,  ear and head shape. Once paired with my phone, Razr V3, it reconnects each time in a matter of seconds (usually). Only once did it take longer. Before buying this headset I had never hear of Plantronics before, but I would say that their products have a good build quality and good sound. I liked these units more than the  Motorola headsets mostly because of the way they fit rather than any sound quality issue.