Don't bother. There are several places within a mile where you can get real pizza. Why they have a customer base in Chicagoland is beyond me (it's not like this is Nebraska). The "crust" is abysmal, the sauce is too sweet, the toppings are lackluster at best (unless you enjoy rabbit pellet sausage), &c. Their pizza has an overall feeling of "junk-food-i-ness", above and beyond that of decent pizza, which turns my stomach. Open the phone book and choose an independent joint at random; you couldn't do any worse than Papa Johns.
Pros: Provide work for those who might not otherwise be employable
Cons: The "pizza"; I would not reccomend making reservations so much as having some.