It is inspired by the novel Rosemary's Baby, but I have not read it, and it's been too many years since I last saw the movie, thus I neither noticed nor was I able to make any connections.
The directing was decent, there was some nice cinematography and I found Julia Garner to be rather good. Unfortunately the script is actually pretty bad at times, uneven is how I would describe it, and most of the supporting cast was, let's just say, not excellent. Dianne Wiest's character in particular, Minnie, was both poorly written and surprisingly poorly acted. One of the dancers, who was the movie's bully, was written in such an over-the-top and silly fashion, it was impossible to take seriously. I really liked the ending though, which significantly elevated my experience. I just wished the rest of the film was more interesting and consistent in tone.
Do you know how many horror movies introduce a character at some point, whose whole reason of existence is to deliver exposition? Well, the exposition lady in this movie was one of the worst and most unnecessary examples I can think of. It tries to be a serious horror film and build up a lot of tension, and then something like that happens, which makes you roll your eyes. There were elements of this film I appreciated quite a bit, so I do recommend it, even if rather lukewarmly. Unfortunately, parts of the movie are not on par with its best moments, to say the least.