I had a cute little H700 and it served its purpose until I lost it.I had to buy another one as the two states I spend 99% of my time now require drivers to be handsfree when taking on the cell. I looked through the reviews and bought this version thinking that it is a newer more robust model. To my dismay the hs850 is freakishly large, cheap plastic looking and will not stay on my ear. The wide ear hook in addition to the size/weight of the earpiece only make the matters worse. And forget about wearing sunglasess and the earpiece at the same time. There is just no room behind the ear for both.If I pressed the earpiece against my ear, the sound quality is not to bad. But that would defeat the whole purpose of "hands-free"If you are a woman with normal sized ears -- try something else.