Awesome place to check out - it's tucked behind Spadina and Chinatown, but if you take any side street between College and Dundas you can get to it pretty easily. It's the most fun to just wander around and hop in and out of the little stores - there's a canning store, a cheese store, and quite a few leather workers. It's not a market as much as a neighbourhood, and it definitely has a Northern California Berkeley vibe to it - adorable houses, overgrown foliage, and lots and lots of cute houses and dirty people.
Pedestrian Sundays are AWESOME - I'm a sucker for street food and there is street food galore. Make sure to check out the small, dingy taquerias!