The trolley tour is great! It takes you to the key tourist sites/locations so you don't have to worry about getting to the sites yourself. Everything was great and I'd definitely do this again in San Diego. My only complaint is that when I tried to get back on the trolley at 4pm after exploring one of the stops, I was abruptly stopped by one of the workers and she informed me (somewhat rudely) that the trolley tour didn't run after 4pm. This scared me to death because all of the paperwork I'd received indicated that the trolley continued later than 4 (I believe 6pm). I thought I was going to have to find my own ride back to the hotel the way the woman was talking! It turns out that she meant that the trolley was making another loop and would drop off anyone at the appropriate stop, but that the tour was essentially over. She could definitely communicate that in a slightly more pleasant way!!!!!