I've had this headset for a week or so, and so far I like it. It effortlessly paired with my Motorola V551. I really like being able to turn it on/off with the boom mike.I don't leave it on my ear, and getting it on quickly when a call comes in can be tricky, especially with glasses. Hopefully that'll improve with practice. It does feel a little loose, but glasses do keep it on more tightly. There's a small removeable rubber shroud around the speaker that I just took off. Feels better and seems easier to put on without it. When a call does come in and I turn it on, it connects within several seconds.Sound is pretty clear, though volume can be a little low. It can be hard to hear in the car, especially with the window down or at freeway speeds. But then, my car is not the quietest on the road, by any means. Person on the other end said they could tell I was in a car but could still hear me clearly. Indoors in relative quiet, it's been just fine. Person on other end couldn't tell I was on a headset. So far, no one's complained of an echo, which is an issue I've read about with some HS850 owners.Others may like the flashing light on call, but seems unnecessary and just a bit Star Treky for my taste. Oh, well. Nice headset, all the same.