This lands solidly in my top 10 horror movies of all time, which puts it in the company of movies it would be stupid to weigh it against (e.g., Nightmare on Elm Street, Halloween, etc.), but some that are worth considering.
Better than Rosemary's Baby? Yes.
Better than The Exorcist? Probably, but it's been a good while since I watched The Exorcist.
Better than The Shining? I don't think it's outlandish to say that this at least rivals The Shining.…