The hop on hop off tour was good if you wanted to get a glimpse of the city while waiting to get off at a particular stop. We were intent on seeing the San Diego zoo so we stayed on the trolley until we got to the zoo, it took another 20 minutes to walk to the zoo, but it was a lovely day so we didn’t mind the walk. We never got off any other stops, but we were able to see some things along the way. The tour guide was informative through the tour. Next time, knowing that we just wanted to go to the zoo, I think it would’ve been easier just to take a tour directly to the zoo and not do the stops because we thought each stop had some highlight to visit but it was really mostly just points of destination to get you closer to an area you might wanted to visit.