GPS Navigation must be a bit different than it was a few years ago when I was installing early GPS systems in public safety and transportation fleets.
It sounds like you just get in and "think - OKAY, I want to go to Virginia City" and the system takes over. Back in the old days, you had to do some pre-programming, answer a couple questions and then follow directions. I know, I know - Google has come a long way. I just did not know it had come that far.
"Making Sawdust Safely"
"If one's words are not better than silence, one should keep silent." - Caine