Absolutely harrowing. The trick of this movie is to have us spend almost all our time with the antagonists, and they are one seriously disturbing couple. The horrors they inflict on their victims are thankfully only hinted at and happen largely offscreen. In many ways this is a psychological drama dressed up with horror tropes. But weirdly, it works, and it manages to stay on the right side of becoming exploitative while still remaining absolutely brutal. Yes, this is a four star movie in my personal twisted rating system. But honestly I won’t recommend this to anyone but the biggest masochists. Yikes.