We did the all-day Go Car rental and it was a BLAST! The little two-seater car is mounted on a motorcycle frame. It drives well, and the route they’ve chosen has lots of scenic, waterfront, and residential pathways that keep you out of heavy traffic. Of course: you can go anywhere. The car is driveable all over the city, so you can make stops and detours as much as you’d like. When you get back on the “guided path” the audio chimes in to tell you interesting facts, point out sights, and give you driving directions to stay on the guided route “turn left at the next light to see the Painted Ladies,” etc.
This was a perfect way to see a lot more of San Fran than we would’ve been able to explore walking, but a much better alternative to driving around in a car. It is open air, so dress warmly and in layers for the nippy San Fran waterfront. Definitely book this tour!