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.

The movie's neither hopeful in contrived ways, nor hopeless in different contrived ways. Somehow it manages to be wonderful

The film never slows down or bores, plunging from one harrowing sequence to the next.