Used one in Atlanta last week. If you miss your turn, which happened several times, it immediately says, "Recalculating". After about 3 missed turns and me cussing the stupid lady, she comes back with, "Listen, you stupid fuck..I'm doing the best I can. I'm retaining water and the kids are all over me and here your dumbass is trying to navigate through 5:00 traffic in Atlanta."
I turned it off.
Oh by the way, on the way in on 85, I see this sign for "Georgia House of Beverages" in Fairburn, Exit 61. I was curious. I got off, turned right and went one mile. Turned into the parking lot and was face to face with 12,000 square feet of liquid refreshment. A bright light shone down and angels sang.