This movie is filled with the general exorcism movies cliches. But that doesn't make the movie terrible, unless you've watched too many exorcism movies. I personally, don't use the "it's bad if it's been used so many times" judgement. I rate it as I see it. If it's decent, then I'll rate it decently. Even if it's been played many times. Cause performance, acting and plot are the important keys in making a decent movie. And with a plot twist like this one, the writers have just paved the way for a sequel in the future. I'll be waiting for it.
Review of The Exorcism of God
