I LOVE the bluetooth. I override the NAV (using v6.1 with loading file from v5.1) when I start out, then only use the car's bluetooth for any calls made (extremely few) or received (few) while driving. This allows access to the phone book, but speed dial numbers are available without override. The best thing about override in relation to bluetooth is that it allows "transfer call" which is greyed out normaly while driving. So if I need to take an incoming call private (rare) for the benefit of the caller, I can do so easily without stopping the car.

With that said, I rarely receive or make calls in the car. (I'm also not very popular!)