We rode the Pacific Surfliner down from OC for the day and had no specific plans, so we decided on the trolley. It was a great way to see the city. The tour guides are funny, friendly, and so knowledgeable about the city. We got off on Coronado island for lunch and touring the hotel. Because we were limited to about 5 hours and the complete trolley tour takes 2 hours if you don't get off anywhere, we didn't make any other stops. I recommend the 2 day fare if you're staying over so you'll have time to get off at Old Towne, Little Italy, or Balboa Park. Shop around for tickets. We paid $45 each at the visitor center, but I think we could have gotten them cheaper on-line.