I sent back a Motorola S9 because I didn't like it and replaced it with the HT820. I have no regrets. This is the third bluetooth headset I've tried and it is by far the best. I use it with an LG8600 cell phone and it works great with phone calls and music. I think the fidelity is good. I can hear it well while mowing although I have to turn the volume up pretty high. It still sounds good wide open! No noticable distortion. The buttons are easier to manage than the others I had and the directions actually make sense. I do agree with other reviews that after long wearing periods it gives me a tender spot on one ear. I still like it!