I just saw this movie tonight and I must say that it is absolutely amazing and powerful. I feel bad for the detractors whom would deprive themselves of this movie or bare false witness to it.
I saw it last night (Thursday) with two hundred from my church family, then we went back to the church for praise and worship (and decompression).
I had two main impressions:
1) A (potentially) great tool for evangelizing.
3) A great preparation for the comming dark days of persecution of the remnant church of Jesus Christ on the earth. (Oh, it IS comming, and it's going to get REAL nasty).
Also, it dispels the notion that evil is just a "concept" and not related to any real entity. Satan is real, and he is after our hearts.