How bad is it? It's mostly dull, then is gory, but it has its admirers.
Should you see it? It's not exactly required.
A woman searches for answers to her sister's disappearance in a religious cult. Done in found footage-style with acting that seems at least partly improvised, the first 80 minutes are dull, but must be watched carefully for the final 8 minutes to make sense. At that point, the film becomes wildly violent. The most memorable scene involves sex with a desk drawer.