Want to know if Indiana sucks?

Spill.com promises to let you know ahead of time if a movie isn’t worth the $12 bucks for a ticket and 8 dollars for trans-fat laden popcorn.  In fact, they promise, “”If it’s crap, we’ll tell you.”
Gee, thanks guys. But, um one question. What credentials do you have to decide if the movie is or is not worth a trip to the cinemaplex to fight with gum-chewing pre-teens who giggle and suck face in the back row? I mean anyone can write a review, right? I prefer to see for myself.