The Unholy is a good movie with typical cliche horror movie jumpscares and it definitely gives a chilly vibe. As a fan of Evil Dead movie i can definitely see the resemblance with the director's pattern. But looking at this movie from a religious perspective it can be seen from both sides (if you closely watch the details and the flow of the storyline). The good things that come from the Church overcome evil at the end, and also the Bible citations from the beginning to end of the movie. Also, they portraited Mary in both lights, as her being the saviour of the situation with the God itself, and of course as a negative character which is possesing the protagonist.
Recommended if you like a bit fantasy/ish monsters, typical evil plot aka possession of a person, but maybe not recommended if you are a very religious person.