This film is so scary and hard to watch, but it's the first film to make me think "Satan really exists",not only in the bible,you should pray to god to avoid them,this is the powerful of this film to get into religious material and make me feel how awful of this world in the hand of Satan.
P.S.I'm not a christian, just someone who think a lot about god.
I just give it 7/10 because sometimes it's too much to handle this graphic violent, the film itself and the point of story was powerful for 8/10.