I absolutely ADORE Acapulco. Their Chicken Nachos (which I always get, drenched in extra queso) are to die for. Bottomless Chips and Salsa, Bottomless Drinks, and HUGE portions. I've been there five times, with several different people (all of whom can eat like nobody's business), and I've never spent more than $20 for two people.
Pros: Food, Price, Service, Atmosphere