I have mixed feelings about this one. First, the pros. It looks incredible, cinematography is stunning through the entire picture. I also really enjoyed the tension building throughout. Plot and tone-wise it reminded me a lot of Brimstone and Treacle, or the more obvious Night of the Hunter. The music was well crafted and helps immensely in building the tone of the film. And for the most part I thought all of the performances were great. But...
I wasn't a fan of Mark O'Brien's performance overall. It felt a little forced at times and his glossy eyed bad boy just didn't work for me. There were also issues with the plot, mostly small stuff but I also found the final act to be a little too short on information. Obviously that's intentional but I feel too much was left unsaid about what exactly is happening.
Overall, definitely worth a watch if you're into slow-burn tension filled occult/folk horror. But you may be disappointed with where it all ends up.