[Free Ben Hur!]

Thinking about a San Diego / Tijuana trip. There's a short thread here about San Diego but not a great deal about Tijuana. Is it a hassle getting across the border? Things to do? Places to eat? My Dad was living in Cali and he said there were thousands of Americans streaming across to see doctors and get cheap prescriptions. And that it was pretty much a tourist trap. Is a day enough to see what you need to see? Any point venturing outside of Tijuana if you have a rental car? Is it better to bus to the border and walk across or take a rental car? Any comments / thoughts would be appreciated.