It was mesmerizing; the pacing and filming have a dreamlike (nighmarish) quality. This is more than just a retelling of the story, and there was no place where I felt it "went wrong". It is not a violent film; there is very little here. Cliches like taut, and suspenseful do apply. I was highly impressed.
I'm being a bit vague, as I do not wish to give anything away.