Does anyone have this installed in their car? If so how well does it work compared to an aftermarket setup (kenwood, alpine, pioneer etc.) Does the factory Nav system have voice direction (as in tell you when to turn)? If not do any of the other Nav systems have this option. http://18.104.22.168/jetta/jetta1/125971_9_full.jpg
My Aunt's Acura Nav system turns down the radio and some female voice tells you when you are getting close to your turn/exit. It also turns you stereo down when you're receiving a phone call.