When I visit a city for the first time, I often book hop-on/hop-off tours so I can become familiar with how the city is laid out, where the major attractions are located, and avoid the hassles of parking a car or taking a cab. This tour company met these expectations, and the free second day helped me get to places I didn't have time to explore the first day.
The office is in Alamo Plaza, across from The Alamo, so it's a short walk from most places downtown. Guides were courteous and friendly, but their narratives were not as informative about the history and culture of San Antonio as I expected. Yet I would recommend this tour to first-time visitors, especially if the hop-on/hop-off feature is used.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.