Great acting from *most* of the cast, and very atmospheric, but completely ruined by the plot. Fully incoherent. What frustrates me is the dozens of clues/details that are thrown out without going anywhere. For instance:
**Spoilers ahead**
1. Longlegs sings, "if you let me in, it will be nice, but if you make me go, I'll come back, not once, not twice, but as often as I like."
So the family needs to let him in, right? That's why the mother needs to bring the dolls? Wrong! The Harkers don't let him in, so he just breaks in and ties the mother up. And the other families do let him in, and they all die anyway. So it makes absolutely no difference whether he is "invited."
2. The dolls are needed for mind control. They look like the daughters and have a clear connection to them on two occasions (main character and the institutionalized one).
So the daughters do the killings under the dolls' influence? Wrong! It's always the fathers. It makes absolutely no difference whether the daughters are mind controlled.
3. The main character has a psychic connection to the devil. So she is doing the devil's work inadvertently? Nope! Nothing she does advances the murder plot. It's always her mother.
4. Longlegs writes coded letters. The letters are never explained, but they each make reference to a particular farm house. So the farmhouse is the origin of the murders? No! It's just one of sites a doll is buried.
5. Lee is told by Longlegs to let everyone know how she got the letter -- or else her mother will die! She never does do, but Longlegs never kills the mother. That letter served no purpose.
6. During the interrogation, Longlegs says something like, "each child is given the choice to accept the gift and die or reject it and bow down." But none of Lee or the other kids are given that choice. They have absolutely no control over accepting the gift.
There are many other holes and dead ends like these. I got the feeling that the writers just did not care about this movie and threw in a bunch of elements (dolls! psychic powers! satanic codes!) with a random name and look, and trusted that the audience would not notice. We notice!