Tried the H700 with my Motorola V60i phone and Motorola's Bluetooth Adapter. Pairing was no problem (although you have to be fast to get the H700 into pairing mode). Voice quality of the person on the other end of the line was quite good: clear and loud. However, my voice echoed in my ear. The person at the other end also reported hearing an echo, as well as choppy voice and background squealing. They reported the problems to be worse when I called from my car, but they also deemed the quality unacceptable when I was calling from a quiet room. Switching in mid-call to the handset immediately improved the sound dramatically, they said.I recorded messages on my home answering machine using both the phone with headset and the phone by itself: the phone by itself was far more intelligible.The headset is light, small, fairly comfortable to wear, and the quality of the voice from the speaker was remarkably good. Unfortunately, the poor quality of the transmission of your own voice makes this headset nearly useless.I noted something that I have seen other reviewers complain about: the microphone boom is so close to your face that it touches it at times. I don't think the voice quality issues I experienced were attributable to this, however, as it didn't seem to change when I kept the boom away from my face.In its defense, I can only theorize that somehow Motorola's Bluetooth adapter uses outdated and/or less sophisticated technology - although, again, this didn't seem to hurt the quality of the sound of the other end of the call as heard in the headset. You may have better luck pairing it with the latest Motorola phones with built-in Bluetooth. I wouldn't count on it, though. Motorola phone support said there was nothing to be done except try another H700.One last point: some people seem to like that you turn the headset on by opening the boom, and off by closing the boom. I found that with the headset "on" there was intermittent noise from the speaker, which was irritating. I would rather be able to wear the headset with it "off", and turn it on when a call comes in. However, to turn it off you have to close the boom. Since the boom is already resting against your face and ear, closing it requires pulling the headset away from your face/ear to allow clearance. Then the closed boom makes the headset awkward to wear, because the headset no longer sits comfortably against your ear. I think I would rather wear the headset with the boom always extended (the boom is pretty small) and have a button to turn the headset on/off.