If you go into this expecting a great film, you're going to be disappointed. This is based off of a Jack Chick pamphlet, so you know that it's not going to be serious business.
What makes this film is that everyone tries to play their roles as straight as possible. There's no Leslie Nielsen-esque romping or Jim Carey mugging for the camera. Calling this a parody isn't entirely accurate, however it's not entirely *inaccurate* either. The source material here is so absurdly ridiculous that there's no need to lampoon the fact that some religious groups are over the top ridiculous when it comes to "demonic" material because they do it for you. It's like petting a cat: you just put your hand down and it does all the work for you.
The end result is a film that can arguably be called "bad", but bad in all of the right ways. The acting is decent and the script, while ridiculous, is pretty hilarious. So far there are only two avenues for getting this film, either a DVD via Amazon or a direct purchase from the official website. It's absolutely worth purchasing at least via the website and it's a shame that it's not more well known than it it currently is.