My score for this mystery and horror movie starring Chris (Daniel Kaluuya) and Rose (Allison Williams) is an 8/10...
This high but not perfect score is due to how interesting the movie is. The truth is that as it develops it traps you in an incredible way and the best part of all is that what you think is going to happen doesn't happen, so it surprises you!
Something I also liked quite a bit was the background sound. They were chosen in an excellent way and they are so well synchronized with the scenes that they generate and intensify the same sensations that the person inside the film is feeling and that's great!
Alert! A little Spoiler is coming but I need to say it now! :D
There was one scene in particular that I liked very much and that was when Rose was defending Chris from the abuse intended by the policeman who stopped them on the way to their parents' homes. It was like what every man expects to happen to him in real life hehehe.

This film is categorized into mystery and terror, but I felt it was only the first. It makes you think and/or ask ¿what's really going on in it? Why does this happen? Why do they act that way? Why do they presume it that way? But TERROR as such, that makes you jump out of the chair, I didn't feel and this is one of the reasons why I don't give it a 10/10.
What I didn't like about the film was the end, it leaves you with a lot of doubts. How did they explain everything that happened to the police? Did they believe them? What happened to the acquaintance Chris recognized at the party? Were Rose's parents the only ones with the ability to do those treatments? These are questions that must be answered! Will it have a second part? Perhaps...
If you're not interested in the doubts with which I was left, then this is a film you should see! It's worth it.