I've been using the 850 daily for about a month now and I'm taking it back. When conditions are ideal (I'm within 10 feet of the phone, I have excellent service coverage, and my ear with the 850 on it is toward the phone, no wind, no background noise) it works really well. When any combination of the parenthetical above occurs say goodbye to the clarity on both ends. I'm tiring of my friends saying take that stupid headset off, I'm getting every other syllable. I had high hopes, but the technology's just not there yet. At least not with this headset. I think the long boom headsets are bound to be better. That's what I'm going to try now. Fair warning on this headset. Looks cool, but who cares if it doesn't hold its own?