This is my first Bluetooth headset and i am pretty much contented with what its offering. Compatible with my mobile phone Motorola v600 and Razr V3. I normaly use it while driving and the voice is quite clear on both ends. The only problem i see is the headset doesnt hold much battery power. It needs to be recharged quite often. The headset is quite bulky as you can feel it in your ears. Bluetooth headsets are not in market for a long time so i dont expect much either.Overall a good handset.