Very good. Good battery life, nice mini-USB charging port (convenient), decent sound quality on both ends. Just a bit of crackling, not quite as strong as some other bluetooth signals, when arm or body in the path of the headset and device. And perhaps a little annoying that the bluetooth light is so big and prominent. Also, the button may be a little too easy to press, if it's in the pocket or a case, when you don't want it pressed.