Ive had this product for over a year with no problems. i tried the ones with the boom mikes which were more problems than any thing else and normaly i ended up hitting the mike with my hand.. also wearing sunglasses was discomforting as well.. With the jabra i noted no background noise while using the unit with the windows up and air on which is what you would want to do any way while carrying on a conversation in the car. as far as the body noise goes that problem can be solved easily however since the mike is part of the ear piece the person you are speaking to will hear all that you do this includes gritting teeth and chewing on m&amp;m's while you talk over all though there is no better unit currently on the market that is as convenient..