I have used my new H700 for about a week. First off, beware of counterfeit units: I first went with a low priced unit and found it was counterfeit when I examined it using Motorola's handbook on counterfeit models. Performance was poor (lots of static). The second purchase yielded a genuine product and the performance is much better. (HOwever, even this unit came with a European charger. I had to call the vendor to request a US version. Man, internet vendors can be a real pain!)A comment on versions: I read alot of posts that described A, B and C versions with the C version supposedly optimized for CDMA type phones. But after a few calls to Motorola (the first tech support guy had no idea there were even different versions) and some emails, I found out that the only difference between the versions is some details in the pairing procedure. All are supposed to be compatible with any Bluetooth phone - no special versions for CDMA phones, etc.Performance of the headset seems solid: good audio quality for both sides of the phone conversation. I haven't really tested the Bluetooth range but it works fine while driving with the unit on my left ear and the phone about 4 feet to my right on the passenger seat. I don't have enough use to really comment on battery life, but the charger is SLOW. It takes over two hours to get a full charge. The multi colored LED on the headset is helpful to know what the unit is doing (pairing, charge progress, etc).My biggest gripe about this model: Motorola blew it in terms of ease of use. The unit is turned on by unfolding the boom mike from the headset body, (a big improvement over older moto headsets where you need to hold down the main button for a few seconds until it recognizes that you want to toggle power). However the headset must be off your ear to flip the boom out: the boom is facing your face and the ear hook is folded closed when the unit is turned off. In my opinion, it would have been much better if the boom hinge was on the outside of the unit. Then you could wear it on your ear with the unit off to save battery power, and flip the boom out when you hear the phone ring to quickly activate the headset to take the call. You Moto guys listening?