Original review:
https://www.themoviedb.org/review/6a170b374ac8a9a135fcdcf2
This is quite brilliant
Right off the bat DO NOT WATCH THIS MOVIE unless you have seen Resolution (2012) first. It serves as the setup and part of the "build" for this movie.
This movie is the larger of the two, with a bigger scope, a more ambitious take on its storytelling. It does this well, for an indie horror, and its constraints. The characters work, the storytelling is solid, the tension real and the acting is good. I highly recommend this, but only if you watch Resolution first. If you didn't then you are a missing out.