for the most part my bb can work fine running googlmap but as dan mentioned above, it eats battery power and the bb's screen blacks out if i dont touch the keypad from time to time so it's kinda annoying.
with the nuvi it's hardwired so i start the car and it's ready to go...plus i can type in the addresses at my desk instead of inside the car. also i can have the nuvi and my HU's screens fully functional without having to flip between stereo/nav screens so very convenient. for $100, can't go wrong.
