I have a Tom Tom. The woman's voice was constantly scaring me. So we switched it to a male English accent.
I have a terrible habit of getting lost in PA. Especially this one particular place where there's a bridge and a few exits very close together - making the "Exit Right" difficult to discern WHICH right. I always choose the wrong one. During a particularly frustrating part of our trip - kids screaming in the back seat, few wrong turns, just DONE with the trip, the Man told me to "Go Straight Home"... I told him I AM TRYING!!!
After he repeated it a few times, and the kids were quiet, we realized he was saying "Go Straight On".
Oh.
I think the use of GPS can be helpful, but relying on them ALWAYS is somewhat dangerous. People seem to not be as aware of their surroundings - why do you need to read signs when the GPS will tell you "Turn Right" when you need to? It is an instance where I fear technology is actually making people dumber. i.e. cell phones - no one memorizes phone numbers anymore, it's programmed. I think one should still have a map in their car and directions on paper to where they are going.