I think it is amazing considering the original feel of the plot. I was telling my friends that the movie looked completely corny 20 minutes into it, but 10 minutes later I couldn't get enough of the film.
My friends and I decided to call it a Spiritual Thriller because of the way we sat in our seats thinking for 20 minutes after the movie was over.
There was also a very well put together mix of horror and comedy, so that very serious points could be made and then you would find something to laugh at.
Mel Gibson did an astounding job. Go see it!