We are visiting San Diego this week and are trying to decide if we should make a side trip to mexico. We are not renting a car for most of our stay, but could rent one for the day. It seems like finding a rental to take into mexico is a challenge though. I have heard really good things about Ensenada and not so stellar things about Tijuana, but the source was there many years ago, so I would be open to going to either. My questions are wether you all think a trip to mexico is worthwhile? We love authentic mexican food, so that would definitely be a draw. Also what would be the best way to get down there? I had read about taking the san diego trolley to the border and walking over, but are cabs readily available after this point to take you onward? I really thought a bus would be easiest, but all I've found are tours. I really don't want to be stuck with a guide and a bunch of people. I would really love to find a bus that takes you from San Diego into Mexico and just drops you off and picks you up. Does such a thing exist? Any other good ways to get down there?