*no spoilers* I am a normal movie watcher and not so pretentious to drone on for what could be a collage essay telling you why I did or didn't like the movie.
Do I reccomend it yes, but...
The suspense, unease and confusion of this movie kept me watching. I love when a movie makes me sick to my stomach without gore and this did that.
I didn't read the book and that seems to be a lot of peoples issues as there is some missing context. You may have to look up what it or some of it was about when your done. That does a disservice to viewers like me because you can't fully walk away satisfied after it's over.