Overall I liked The Nun it was a spooky fun movie with some pretty good shots and scenes (lighting, camera angles, and such). The transitions from one scene to another was a bit off and the story overall had a more fantasy tone over the more grounded and realistic tone The Conjuring and Annabelle movies had. Much of the story felt like it was just forced to setup a shot or scene which does hurt it. It isn't a perfect movie but I'd watch it again. It is like Indiana Jones meets Silent Hill. None of the character actors felt out of place or superficial either, I really appreciate that. Everyone felt believable and natural to their roles and environment, not forced.
It looks like they attempted to make an inoffensive horror movie...not really in the PC sense of the word, but in the "we are going to do just enough to get an 'R' rating in an otherwise PG movie" sense of the word.
It's not really frightening. It's not really scary, it's not really gory, and the nun herself is not really ominous.
It just sort of is.
And, really, it could be a lot better.