Schlotzky's is interesting because everything about it talks about the sandwiches and being a sandwich place, and I've had the sandwiches a few times and they are certainly unique, they have a unique spongey kind of bread at Schlotzsky's, but my favorite item has always been their secret star, the pizza. Call it my personal preference but the pizza here and at Rosati's are probably the two best I've ever had, and they have pretty good cookies here too.
Schlotzskys is definitely one of the more underrated chains, the location doesn't really help much but it's still definitely worth a try, especially if you want to try a new pizza.