I'm not sure if you can tell by my passed reviews but I love sandwich shops.
This is my 3rd or 4th trip to potbelly and I only have one complaint.
What I like is they have a good selection of sandwiches, salads. The bread really sets the apart from the other places. It's a little flatter with bread like feel on the outside instead of the classic crunchy outside soft inside type of bread.
My only issue with potbelly is I think there sandwiches are to small. I remember once while on a business trip we had lunch at potbelly and afterward the three of us were still hungry. We ended up going to another place for more food. For me, the worst thing is having a meal and walking out still hungry.
Still, you can't beat the price. "Large" sandwich, chip, and drink was about $11. Not bad.