Not good
Julia Garner does a good job, but the film feels like a bad remake or rip off of Rosemary's Baby, instead of a prequel. It's not satisfying or enjoyable and drags at times. There are a couple effective moments, but we have seen them before and done better. The screenplay is predictable, formulaic and mediocre. This feels like a step down from the director's previous film, Relic. 5/10 is my rating.