We had limited time in San Francisco and wanted to see as much of the city as possible. I booked the 6 hour Famous tour because this company is one of the highest rated on Trip Advisor, and it is definitely deserving of its ranking!
There were 14 of us on the tour, and we were shown the city in a very comfortable mini-bus. Bob was our guide / driver, and he was EXCELLENT!!! He was so friendly and welcoming and shared tons of very interesting information! We saw so many sites we would not have seen touring on our own. The highlight was definitely the 1+ hours spent in Muir Woods. It was absolutely beautiful and probably not a location we would have thought to visit.
We took an evening city lights tour with another company (which I won't name) the night before, and the guide was so rude and arrogant that we considered cancelling this tour ... fearing a similar experience. These concerns were alleviated as soon as the tour started, though, and it was one of the highlights of our vacation. I definitely recommend Dylan's Tours ... and hope you get Bob as your guide!