ok... maybe I had a lemon.... but the one I put in my girl's car sucked hardcore!!!!! We ended up getting her a D3
the F would lock up the ipod, start turning the map around when stopped at a light, take weird made up routes, and the blue tooth sounded like a can on a string!
The D (we both have one now) is much crisper on the phone, doesnt mess with the ipod, and always knows where we are