This place is in the 'hood, so my SO and I check it out sometimes when we feel like doing something on the weekend.
Really, the best things here are:
1. The pirated movie selection - anything you want, especially if it's not on DVD yet. You have to get there early though, or the police will have busted them all. Movie shopping should be done before 11am or so.
2. The random finds: sometimes the produce is good, most of the time it's gross; sometimes there are cool fashion finds, but most of the time it's weird and/or cheap (there are GREAT knockoff "official" jerseys sometimes though); sometimes you'll find a treasure in the used/antique booths, but most of the time it's junk.
It's a fun trip, but more for the experience of the atmosphere and people than the shopping!