Pros
Free movies, although it's only for you, immediate family, and ONE guest. Free popcorn and drinks during shifts. Flexible weekday hours for students. Coworkers are always friendly (because you have to band together against the management). Certain duties don't require thinking (ushering and cleaning about).
Cons
Stubs. They push employees to sell Stubs like crazy and it's one of the factors that gets evaluated every 6 months on the employee evaluation (along with friendliness, cleanliness, and quickness). There are even AMC mystery shoppers that are hired to check that employees try to sell the Stubs card for EVERY TRANSACTION. If somebody fails it, they're fired. Quick turnover. Once a new group has been hired, a group of people get (arbitrarily?) fired, making the new hires nervous to keep their jobs and the veterans even more nervous. And obviously customers will make messes and will make a fuss about anything and everything.