I always found the headsets compelling, yet too quiet. I had the original and then later an Icon, and love the noise-cancelling technology. Even in a convertible with the top down on the freeway it sounded great on the other end.

But I always fall back to my Shure in-ear headphones because the audio was too quiet for me. If you seal the ear canal you can get away with quieter audio, but Jawbones don't seal your ear canal that way. Too bad.