This is not for the faint of heart...
As an avid horror fan, I found this to be an incredibly hard watch. Some narrative choices were extremely questionable given that the characters are underage. This film borders on being very disturbing versus outright exploitative.
I don't think this is a great film by any means, however, it was undoubtedly effective and visceral. So much so, that I had to take a break while watching the last 30 minutes of it. I never want to watch this movie again, and I don't feel as if I can properly rate it. Effective? Yes. Good? Questionable.