Built in NAV, can and should provide more and better features than another device
Liked the GPS in my Chrysler Pacifica when we first purchased it. Just about my favorite feature was that it was located centrally for the driver and could easily be glanced at, through the steering wheel, while driving. It was easy to correlate the road with the displayed map. Sadly the $200 updates, lack of software updates, hokey method of address entry resulted in it's demise.
Love to have a system in the car similar to what my iPhone offers plus:
- Dead reckoning - drive in Boston and you'll know why
- HUD - cuz yup I wanna be a pilot
- Software upgrades
- Voice control