GoCar rentals has introduced a way to take a guided tour without the guide or other annoying tourists. In San Francisco they've introduced a fleet of mini two seat, three-wheeled buggies which resemble bumper cars on steroids. Each car is outfitted with a GPS system and about a hundred audio clips on points of interest that are triggered whenever the points are neared. The basic premise seems good, allowing tourists to in effect have a knowledgeable tour guide with them as they traipse around the city. Unfortunately the cars aren't quite up to the challenge of San Francisco's (rather steep) hills which makes you wonder why they didn't introduce this somewhere else (i.e. flatter). Also, the entire setup is rendered obsolete by another device, one not linked to a goofy car, that you can carry wherever you go and however get there: a guidebook.