Amazing and scary movie, with just a slightly weak ending

Rating: 9/10 (11 July 2017)

The tension in this movie is incredible. First genuinely scary movie that I have seen in quite awhile. It starts off strong, by keeping the antagonist as an unknown unseen force. That's what is so scary for me. The unknown. Another great thing is the the protagonists are reasonably intelligent. They don't do anything too terribly stupid in response to the things that happen around them, which was a massive relief for me. Stupid characters is a huge problem in many horror films.
The only real slight weakness is towards the end. It starts getting a little over the top and weird. It loses some of the unknowns and subtleties of the first third. But it's still mostly scary, and worth watching.