My husband and I booked the tour for the second day of our 12-day stay in beautiful San Francisco in order to get acquainted with the city before we struck out on our own. Greg, our tour guide, was extremely professional, friendly and provided great information during the day. Alcatraz was so interesting, and we didn't realize we were going to Twin Peaks- thank you, Greg! He conducted the tour at a relaxed pace, and we sure covered a lot of ground ( and water) that day. We enthusiastically recommend this excursion, particularly for first-time visitors to San Francisco.