Our tour guide, Michael, was thoughtful and engaging, with an extensive knowledge of San Franciscan and Californian history and an understanding of how that fit into the broader context of world history; he offered a detailed, extensive, and personalized introduction to the city. If this sort of in-depth knowledge appeals to you, this is your tour! It was like having a 4 hour seminar, while driving to the very varied parts of the city! We had a great time! We'd recommend this tour highly for the content, the pace, and the overall experience. It was a real pleasure and highly engaging!