I'm just gonna start by saying that if you're gonna watch this, you may want to prepare yourself with diapers and a punching bag at hand. I didn't, and now I'm sitting here like "fuck you... fuck you". No, that isn't because it's that scary; it isn't, although it does have effective and quite original suspense moments and plenty of fucking jumpscares, but because of the volume. I mean, holy fucking shit, the first distorted scream/noise mess literally made my ears ring for a good while. And, since there are a lot of moments like that in the film, my ears are hurting and everything sounds muffled since. If you can handle listening to Merzbow at full volume, you have nothing to worry about, but if you can't... well, you are going to want to throw your headphones (or speakers, whatever) into a wall. That's what the punching bag would be for.
Other than that, it was actually pretty good. The demon voices were hilarious at some parts, though. But yeah, I liked it. I'm not gonna spoil anything, and am just gonna give it a 75/100. Could've been much better, but it was pretty fucking awesome.