Everyone else is right about the huge portions, particularly the french fries. If you get french fries with your meal, don't bother ordering any more for the rest of the group - most of the time, 3 people can share a single order. Sure, it's deep-fried food, but as far as it goes, it's remarkably non-greasy.
Pros: Inexpensive, Fast, Casual
Cons: Street parking only