The Jonestown Massacre is one of the scariest events in history. Jim Jones leading almost 1,000 people to their deaths through his mass delusions and paranoia. The PBS documentary, the surviviors' accounts, Tim Reiterman's book on the subject, and the absolutely chilling audio taken from it add up to something that has fascinated me in the sense the West Memphis Three does.
Ti West's thriller is a take on that. The film follows very closely to the facts of the event. With some exaggeration. The problem here is the exaggeration and the potential for how good this could have been. You already have a terrifying story in your hands, so to embellish it with anything more dampens the mood.
That being said, the movie is intense enough to warrant a recommendation.