The H700 is very light and comfortable to wear - I read on another forum that it is wise to try a headset on before you buy it. It fits me perfectly, but as no two ears are exactly alike, it might be too large or small for someone else. The ear hook is not adjustable in size although it can be changed to be worn on the left ear (the H700 comes set up to be worn on the right).Pairing was easy and straightforward with my V3 RAZR even though I attempted to do it without the instructions and messed up the first time. After pairing, I need only open the boom to connect the devices via bluetooth. However, it is not so easy to switch from handset to headset during a call - if you are thinking that all you have to do is open the boom and push the call button to switch, think again. I had to select "Handsfree" on a menu with my phone, not as simple as I thought it would be.Transmission quality varies, apparently dependent on the time of day I am using it. I have no problem at night in any location, inside buildings, in the car or even in a basement. During daylight though, there is a very noticable decline in sound quality. I hear static on my end and the person on the other end of the line claims that my voice is sometimes muffled. At one point, as I was holding it in my hand while talking on the headset, the phone notified me that bluetooth signal was low and I had to switch to the handset. This is possibly due to radio interference from other devices, particularly wireless internet access points actively sending data. I assume that my neighbors aren't using their WAPs much at night. One thing that was strange is that after disconnecting from the headset back to a handset during that very staticky call, the static does not disappear. Hanging up and calling back fixed that problem, I can't think of any reason why this would happen.I tested the noise reduction software while driving in the car; the H700 did show a reduced level of ambient noise - I could still hear the other person clearly and vice versa.Overall, the H700 performs well, but the new features don't really make it that much better than other, less expensive, headsets. The H700's single best feature is the fit and being able to charge it on my RAZR's charger so I don't have to carry a seperate one.