I saw this movie opening night and it was definitely good!
Like someone already mentioned, I wouldn't recommend seeing it if you are faint of heart or have a weak stomach. (Also - I saw it at a movie tavern w/ food.. after sitting through that, I wouldn't recommend eating during some parts either, but I'm a scaredy cat

)
It was really really good and definitely something I would like to see again. It definitely keeps you wondering 'what's going to happen next?'
I definitely liked Ashton in this "non dumb ass role" and think this movie will open up doors for him b/c he won't just been seen as the guy in "Dude, where's my car"