Sp3ctre, I'm with you - mine stinks. No one can understand me, and it's very difficult to understand the voice on the other end, no matter how loud I turn up the volume. I've tried calling my own voice mail and testing it just to hear how I sound - it's awful. One thing to note (if yours is like mine) - the louder you speak, the more the system will compensate and make you almost inaudible to the person on the other end.
I've had it to the dealer many times in the last couple of years. They finally found an antenna problem, but that didn't do much for the voice quality. They even replaced the microphone twice. I've pretty much given up and consider it a costly mistake.
Occasionally I think about just fitting a Parrot system. The sound quality on a Parrot is amazing.
PS: This is my first post on this forum. Really miss the old one..., but glad to find this one!