Okay, I admit this film isn't a masterpiece by any stretch, but slasher aficionados should find it enjoyable. I certainly did and was rather surprised by all the negative reviews I'd previously read. Granted, it's slow going in places, but the murders are genuinely creepy, as well as performances by Dennis Robertson as the twisted Father James and Allison Biggers as the deformed sister, Mary. Some ample doses of blood (in the unrated version) also add to the proceedings. While the film may not appeal to erstwhile horror fans, anybody with a taste for slashers will surely appreciate this entry in the genre.
Note: Some reviewers have condemned this film for lifting a scene out of HAPPY BIRTHDAY TO ME, but the the fact of the matter is that both films were released in the same year (1981), so it's debatable as to who stole what from whom. Personally, I preferred the scene as it was staged in this film, regardless of which came first. See it for yourself and you be the judge.