Although I had been to San Diego a number of times on business, it was my wife's first time. We took the Hop-on Hop-off Trolley and found it excellent. It includes narrated pass-through visits to various San Diego communities and historical sites. The drivers/conductors were professional, friendly and courteous accompanies by music. In summary, it is a great way to get acquainted with San Diego. We have used the Hop-on Hop-off Trolley in other cities and plan to do so next week in San Francisco.