Today's Chronicle (Sunday) has an article by Rob Morse about 99 Ranch. Hopefully the URL for the article that I've put at the bottom will work.
According to Morse, and Shirley Fong Torres who he mentions in the article, it's a great market. There are evidently several locations. Has anyone ever been to a 99 Ranch? What's it like? How does it stack up against the Bay Area farmer's markets?