Parents, this one should not be within fifty feet of the littlest ones.
I have a filmmaking related degree; I live and breathe it like an encyclopedia and studied it in college. I know many of the tricks used in film to scare people and make fx myself for a living.
I am also a survivor of my babysitter's big mistake of letting Freddy Krueger films sit on the Ottoman unguarded and mixing it up for the Care Bears. Could have done without that on my path to my profession: brightly colored bears and a dream demon with knives for fingers do not mix well in the mind of a seven year old. (This is why I don't allow my little niecelings to see my work unless it is 1000% cuddly.)
Parents, this one should not be seen by anyone at bear minimum fourteen or fifteen years old & should be kept away from little kids. Your twelve year old may beg, but do not give in. This is a very frightening tale involving a witch and the family dog getting killed and people levitating and near child sacrifice to a demon. That's just without giving it all away.
I would recommend this to teenagers having a Halloween party in the living room but middle schoolers at a slumber party is a big no no. (Someone a whisker shy of fifteen might be able to take it, but not a nanosecond before.) The quality of the film is very good and a worthy addition to the horror canon started all those years ago in the silent era; this could be said to be the spiritual son of Poltergeist (1982) and the Exorcist (1973) since it inherits a lot from those two landmarks in terms of visual design, pacing, and setup. The acting is believable, not an Oscar performance, but it nails the sweet spot between overboard drama and cheesy, where it makes you want to get lured in. (Hitting this is not easy and a lot of B horror films make an Olympic even of failing to hit it. The list is long.) Kudos to the set director and the costume design, right on the money, and hats off to the director.