Very well executed

It's hard to see any effort in the film. There's no comedy to speak of, no real drama and, worst of all.

Go in cold, and you're likely to emerge with your blood boiling. This has to be seen to be believed.

The movie is made so realistic it has a lot of that WoW feeling at the right moments and never tooo over the top. the suspense is done so well and the emotion is felt. Very well put together with the music and all.