Hereditary
Finally sat down to watch this last night. Can totally see what it's been so divisive, it's a good horror film for a start! ;P
But no, genuinely unsettled me in a way that no horror film has in quite some time. It's premise starts out relatively by the numbers and you think you have this vague idea as to where it's heading, but then it completely changes direction around half an hour in and I was at a loss as to what was going to happen (an example of truly excellent marketing on the studios front to keep the twist a secret).
Seen quite a few people complain about the ending and initially I would have agreed. But in retrospect they took the time and effort to seed it throughout the film and as a result I was quite taken with it a few hours after.
Can see where the comparisons to The Exorcist come from, but to me it felt more 'Lynchian' throughout, though perhaps not as madly unchained as something the main man himself would have made.
In short, bloody loved it. One of the most original films of the genre since 'The Babadook'.