I ordered a burger combo and it was around $13. I think the prices are on the upper end of burger chains. In comparison with other chains in terms of quality, I would rate South St. Burger Co. above Hero Burgers and Burger King.
I liked the variety of toppings they had to offer. They seem to use whole grain buns which made the burger tougher to bite into. The patties were slightly above average. It just wasn't as juicy and fulfilling as I would like them to be. The New York fries were decent but not good enough as the ones I get at food courts.
The staff patiently waited for me to decide what to order and was very polite.
I would come back again.