Personally, I don't find this movie scary at all. It was generic, the storyline was predictable and overall forgettable. I'd like to point out few things that bothered me greatly. Spoilers.
-The wife, after getting stabbed, looked high rather than in pain. I don't know if it was because of the blood loss that she looked high, but she didn't even break a sweat. At the very least she should be hyperventilating. She looked like she was posing.
-After the wife gave birth, and the husband came over, how did he not notice her tummy was flat? He's a doctor, for God sake.
-Some people pointed out that in the timeline, which was in 1960 I believe, racism was still strong. (Though this did not bother me at all.)
-When the wife entered the room, where she kept the doll, to look for her baby. How the hell did she not notice that the doll was missing? That thing is huge. The largest doll in the room. First glance and you would probably notice the doll first rather than all the little once.
-The wife's acting. When losing her baby, she didn't even cry. If I lose my baby, I would go hysteric. I would scream and shout, cry until snot comes out of my nose.
-When losing your baby to a demon, you would be desperate and because of that, you'd fight back. It's a mother's instinct. The wife was just weak.
-When her friend committed suicide, goodness gracious. Lady, is that all you got? I would've gone mad at that point. My only friend committed suicide in front of me, where are the tears? Should've been a waterfall.
-After they got their baby back, did they forgot about the lady, who just committed suicide? I would've quickly called the ambulance. Poor lady, her body was just laying on the cold concrete floor.
-I may be wrong with this one but shouldn't the evidence stay with the police? Or detective? Can you even ask them to let you keep the evidence?
Those are just a few. It was hard to try and remember the story because of how boring and slow it was. Overall, I'd give this movie a 1/5 just for the cinematograpy. The cinematography was excellent, though it was shunned by the lack of atmosphere and insanely slow plots. The doll is creepy and it gives the vibe as well. I think the doll was the scariest thing in the whole movie, not the demon, nothing else. Would I recommend it? No. You better off just watching both of the conjuring series. They're much better.