Good Movie (spoilers)
I just finnished the film, it was very differant.
Unlike most comments I have read I liked the characters of the parents. I thought they were goofy, and young, and most of all real.
I found it interesting to see the contrast between the parents, specifically the differant approches they take to dealing with their children.
The Mother, a doctor chooses to diagnose her children, while the Father, a Minister, chose to exorcise them.
I think that this movie has a lot to offer, and requires more than one viewing to really get a sense of the films message.