On my top 20 horror movies of all time list.

Rating: 10/10 (10 June 2018)

This is not a monsters jumping out of darkness going "boo" type of horror movie. Don't come into this thinking it's a sensationalist monster-makeup horror movie or a jump-scare horror movie. It's so much more than that. Two things make this movie fantastic. First, it's a meditation on anguish so real and believable that it's really hard to take at times. Toni Collette delivers a scene of overwhelming pain and anguish that could win her an Oscar. So much pain that, to borrow from Col. Walter E. Kurtz, "I wanted to rip my teeth out; I didn't know what I wanted to do." It's just a damned good movie about loss and pain, to say nothing of it being a truly creepy horror story. Second, the pacing is phenomenal. It's a slow burn at first, in which the creep-factor slowly builds. By the time you reach the climax...I don't know, I'll just say that my jaw literally dropped open once the climax started.
I'm a horror junkie. I love all kinds of horror movies from comedy-horror like Cabin in the Woods to paranoid horror like John Carpenter's The Thing to out-and-out silly horror like Dead Alive to drama horror like Rosemary's Baby. This is something more like Rosemary's Baby. Rosemary's Baby was fantastic not just because it was about a woman giving birth to the anti-Christ, but because it was a claustrophobic vision of the social powerlessness of being a woman in 1960s America. This is like that. It's going to be a horror classic for sure. I can't decide where it fits in my list of all-time favorite horror movies, but it's top 20 at least.
It's also a movie you need to see twice. Honestly, though, I'm going to have to give it a minute before I see it again. It's pretty rough (in a good way).