Comment So unnecessary (Score 1) 100
I don't know anyone that doesn't have a decent phone these days, with nice map options and data plans. Screens are bigger than ever and resolution is great. Just put 3 x 6 inch pad (with magnet for charging), or just flat area for suction cup. USB port in proximity for power. No syncing, no fiddling, no updating (beyond what you do for your phone anyway)
No brainer.
No brainer.