The customer service is the worst I've experienced in years. I've used this website on many occasions without a hitch, but the FIRST TIME I ran into a problem I got zero cooperation from their online chat support (which I came to believe was a bot). Like so many others leaving poor reviews for this thieving website, I was unable to make it to a movie for which I had bought tickets and was told I could receive neither a refund nor a credit b/c of their idiotic 2-hour window for changes.
Do not use this website. It's just as easy to wait in line or stop by the theater the day before. And if you don't make it to the movie, they'll probably even help you exchange your tickets for another showing.