Pros
Depending on which location you work (some more strict than others') it is a fun and goofy environment that can teach you a lot of the basics of customer service and time management. It was one of my favorite jobs that I had in my teen years and you get tips from a tip pool which is decent.
Cons
A lot of ex-cons work there or in fast food in general, so be careful who you get close to when working in a place like that. If you become a manager, benefits are not great and getting time off is hard, no last minute stuff is liked.