I was totally surprised at how great this film.You could feel your paranoia rise as the film went on and as you gradually learned the details of the real situation.

I gave this film a 9 out of 10, because it was exactly what I expected it to be.

It is neither dumb nor smart enough to be fun, and spends way too much time with its boring human characters.

One of the best movies of the year! Incredible from the beginning to the end.