You buy the tickets on their website. They say they will send a confirmation email. They don't. You contact their support chat and no one answers (20 minutes waiting so far).
So. Let's review. You paid them to get you a ticket. You now have to go to the box office at the theater and wait and line and straighten out their screwup.
How is this better than just going to the theater and buying the ticket?
Oh yeah, you can't get refunds either. It is the definition of less than worthless.