Wow, I had the exact opposite reaction. I saw it last night on my mini-vacation in Biloxi, MS, and I thought it was absolutely awful. I saw Cusack interviewed about the film, along with a clip/trailer, and I was pretty psyched to check it out. But it really left me wanting. I thought the majority of the story was laughable, the effects were, well, ineffective, and the ending was just plain stupid.
I may have just been grumpy since I had lost a few bucks at the poker tables just prior to seeing it, because I know the critics seem to like it for the most part....it just didn't work for me.