No spoilers, but there are scare actor(s) in nearly every room, and most are truly terrifying. They keep a scoreboard up front to track the people who quit because they're too horrified to continue, as well as tracking anybody who pisses their pants. (Yikes.) The goal is to give you the scariest, creepiest experience.
If you've ever been freaked out at a haunt, this one will give you nightmares.