This was pretty awesome, it's definitely a contender for horror of the year. When I first heard of this I thought the premise sounded really weird but unique, I'm glad they were able to pull it off. The performances were excellent and the possession scenes were pretty creepy. Honestly the vibe of this reminded me a lot of Hereditary in areas, in that I was equally as disturbed at some of the scenes. Especially the very first time things begin to go very wrong.
Very much worth your time. Tons of atmosphere, great pacing and a really nice needed twist on supernatural films. Just love to see something come out that feels totally fresh. I like that a lot of the characters felt pretty realistic, the acting was very good.