I wasn't in this Market District very long. I've been to them before and what differences them from regular Giant Eagle stores is that they normally have a wider selection of fresh food, a bakery department, and an area where you can purchase ready made food or a salad bar and eat inside or out.
Prices are typically higher than other grocery stores but the same as if you were looking for the same item at a regular Giant Eagle.
I normally stop here only if there's something specific I need that I cannot find at my local store. The Market District does tend to get crowded and they also offer additional services such as dry cleaning or sometimes a bank.