This is a terrific device.  I use it with my Motorola RAZR V3 and it works great.  I don't know what I did without a wireless headset.  Two things that could be better - first it doesn't recognize ring tones from my phone (but I think that is the phone's problem not necessarily the headset), and second, it occassionally will drop the signal from my phone causing me to scramble to figure out how to go from the headset to my phone.  This doesn't happen very often so it really isn't that big of a deal.