When I call my wife from the jeep hands free, she says it sounds terrible with lots of background noise. Hey, it's a jeep I say. What do you expect?
Seriously though, I try to minimize it's use due to all the racket in the jeep. Music to my ears it may be!
My wife said that mine didn't sound all that great until I move the mic. Previously I had it sitting on top of the steering column, but I moved it up to the windshield frame above the rear view mirror. She sign it sounded much better there. I guess I was picking up road noise when it was on the steering column.