This film only boasts 62% on Rotten Tomatoes, but I'd highly suggest the faux documentary style. Choppy film clips and raw seemingly unscripted dialog place the audience immediately in the film. The Sacrament follows the plot of Jonestown fairly closely, and viewers can't help but find themselves invested in the plight of those held at the encampment.
Reviewers found it slow moving, however I found the pace to only feed into the anxieties the film creates, and allows time for viewers to grow invested and begin to care about the characters.
Watch The Sacrament if you're a fan of documentaries, like vice-style writing, or don't mind the grittier side.