Excellent

Rating: 9/10 (1 January 2018)

Do not watch this movie if:
1) you hate children
2) you don't understand trauma and mental illness
3) you prefer gory, jump-scare type of horror
4) you don't like psychological thrillers
This movie is a psychological thriller--a story which focuses on the psychological states of the characters. Some people who have reviewed this movie apparently aren't aware what a psychological thriller is. This movie isn't fast-paced or full of action, it builds atmosphere. It's one of the few movies that I actually find scary--because it plays on a parent-child dynamic we have all experienced.
My only complaint is the ending, which is satisfying, but a bit confusing. Overall, this movie deserves a much higher score.