A very interesting horror film which mostly leans on building an atmosphere of dread. It makes it successfully thanks to Ali Abassi's neat direction, the exciting photography (very good work with the lighting) and the well organized editing (pay attention to the rotation of the scenes which are taking place inside the house and the shots of the environment outside of it). The story of Shelley isn't very original but is told through a very elliptical narration. This will begrudge many viewers with limited patience since most of the answers the movie puts are not answered clearly. A daring way to narrate which i appreciated. 7/10