Friends at work helped me tune in to Which Wich's opening. If you like Potbelly's you're gonna love Which Wich. They do the conveyor belt sandwich toasting machine thingy and the bread is very similar.
They won me over with the crazy variety of sandwich options. I love their muffaletta olive topping and their honey mustard. Can't wait to try something else!
They're at the south east corner of Park & Woodlawn, above Jason's Deli, on the upper level row of shops.