$5 Hot and Ready Pizza...
The quality of the pizza serves as a reminder that you purchased an entire pizza for $5.
The Hot and Ready Pizza that I picked up seemed as if it has been sitting for a while. The crust was soggy and the cheese was chewy. After picking up a slice of pizza, there was a grease stain, an outline of where the slice of pizza was on the cardboard box.
Considering the pizzas are ready when you walk in (no waiting) and that it costs $5, there isn't anything more you can expect.
The mediocre quality is a direct consequence of the price and convenience.