I think this is my favorite place in Cleveland. If they built condos on top of this market, I'd buy one! Great variety. Fresh food...very FRESH. The place can be overwhelming (in a good way) if you've never been to a large farmer's market. There are just so many choices and they're all really good. My favorite stands:
Juice garden: freshly squeezed juice (and wheatgrass) for a very reasonable price.
Maha's falafels: yummiest falafels in cleveland!
They sell "market bonds" (ie. gift certificates) if you want to give them as gifts or use them yourself. They used to sell them at a discount...not sure if they do that anymore.