In a new city we always try to take a bus tour first in order to get our bearings and confirm what things we will return to another day. We don't actually do any hopping off and on- just viewing. San Francisco was no exception and we took the Big Bus City Tour, partially because it was a live commentary, which we (much) prefer. We were lucky with the guide, Don- an Antrim man who was witty and warm and informative. Could just have easily given 5 stars, since not only was there nothing wrong with it it was actually really, really good. Recommended as an excellent way to see an awful lot of San Francisco in 2.5 hours or so.