After 14 months:
5 Audio quality is superb in all cases (send and recieve)
4 It's got a cord
3 No mute button on the cord (oh, well it's worth the clarity tradeoff)
5 Extended battery life on my iPhone (no power used for bluetooth transmitter)
I've found that theBoom is the best (for me). Wired, so no bluetooth loss due to second radio link (phone to mic). Most people think I'm in a quiet office when I'm really driving 65 mph (or so) on the freeway...