The only grocery store you'll find downtown. Although, it's hardly a quarter the size of your typical grocery store. Products are very limited and waaay overpriced for me. I'd rather make the extra trip to a Giant Eagle or Aldi.
Aside from the groceries, they have prepared meals and made-to-order sandwiches. The Tahini Dream is their only vegetarian sandwich but I definitely recommend it. They use "roasted" eggplant (actually just sliced up eggplant thrown in a panini press), hummus, miso vinaigrette, and any other veggies/cheese you want to add. Simple but delicious. They can toast it up for if you as well. I'll admit, they make some good sandwiches but $10 is a little steep for me.
There's also a little coffee stand, but like everything else, it's pricier in comparison to the coffee shops around market square.