UPDATE: The Backroom Deli serves great, cheap, simple vegan food. I had a cajun tofu sandwich ($6) which was fresh and well-seasoned. My friend had a wonderful, delectable buckwheat pancake (short-stack for $6) which was arguably the best-tasting pancake I've ever had. It was thin, soft on the inside, crispy on the outside and just had a wonderful texture and flavor. Backroom is a great little spot to try in Rochester, I just wish they were open later in the evening (they close at 7 p.m.).
I also highly recommend the spicy spelt burger ($5.99) which was not only spicy, but had a great, firm texture on a wonderful bun.
However, I heard rumors that this place will start serving meat. I hope this isn't true, as The Backroom Deli is one of only a few places in Rochester to get smart, tasty vegan food. If they're concerned about increasing customer turn-out, adding meat won't necessarily help; if they want a real market base, they should move to Minneapolis, which desperately needs a non-raw vegan cafe.
ORIGINAL review: This is definitely a solid co-op given the lack of other options in the Rochester area. The prices are reasonable and there's a good selection of mockmeats, soy products and packaged goods. The bulk section has an unusually large variety of beans, pastas, rice and other staples.
My only gripe is that the deli/cafe portion closes too early at 7 p.m. I arrived at 7:15, after a long drive from Chicago, but the deli was unwilling to help me out (so I loaded up on packaged junk food instead).