In a word - "EFFECTIVE"

Rating: 9/10 (6 May 2018)

I'm not going to go about how this is a well acted movie (it is) or how the plot leaves many unanswered questioned (it doesn't matter). I felt like I had just finished a workout after leaving this movie. I was tense from start to finish, and i'm not particularly queasy or easily scared. My 16 year old daughter (fine for teenagers, if they can handle the tension) and I were alone in the theater, so we could talk, and by god we did, as we had to relieve the tension somehow.
The premise of the movie had me concerned going in that I was about to see a cliche teenie bopper horror flick, and maybe it still is, but it works better than any horror or thriller movie in recent memory for getting the blood pressure going. I was legitimately scared and enthralled the entire flick, and would have gladly welcomed another 15 minutes when the credits rolled.
There is a side dish of tender drama here regarding a father daughter relationship, which actually works, but other than that this movie does one thing and does it well - scare the bejesus out of you. Everything else good about is just gravy on top.
Highly recommended.