For our mother/daughter graduation trip, we chose Silver Lion based on Trip Advisor reviews. Andre picked us up from our hotel for a 4-hr tour of San Francisco and he did not disappoint! We were in a minivan and he went out of his way to fulfill all of our requests for the tour. He was extremely knowledgeable and the tour was completely personalized. Further, my adult daughter has high functioning autism, and he was very aware and conscientious of her "eccentricities." I highly recommend this service, and specifically, Andre!