Where as the Conjuring borrowed from many other horrors but stood on its own (the spin off) Annable falls shy, that said Director John R. Leonetti offers a slick period filmed chiller and the special effects are first class.
It borrows much from the likes of Magic, Child's Play, The Omen, The Exorcist and The Entity to name a few. For a B film concept the acting is above par, Annabelle Wallis' Mia Form is convincing and the introduction of the Demonic harassment aspect plays out well, with Tony Amendola as Father Perez giving the proceedings weight. Written by Gary Dauberman, there's the obligatory woman who knows about spirits and the all knowing detective.
Leonetti effectively builds up some tension, yes it's creepy, mostly thanks to some heavy sound design jump scares and eerie figures, there's a notable lift and stairwell set up, but none of which really involve Annable.
In a nutshell there's scarier doll films out there, it's not as encompassing as its parent film but this is a good way to spend your time until the Conjuring 2.