Just came back from seeing this at the theater, since it looked like today was its last day for most theaters in my area. Solid 8/10 for me, almost 9/10 even.
Lest that give the wrong impression though, I flippin' LOVED this movie. While it was on my radar before, I almost didn't see it at the theater until I watched Chris Stuckmann's review the other day (where he encouraged folks to make the trip). This was exactly the kind of movie I love to watch - full of originality, and it was so many different things at the same time (that is to say, a very cool mix of multiple genres), with very strong acting performances, and very solid directing. It caught me hook line and sinker and I loved nearly every second of it.
There are few words I can think of to succinctly describe this movie, but one of them would certainly be "haunting" in more ways than one. In a very huge way it had the effect of casting a spell on you as a viewer and I loved that about it. I also loved how nebulous it was at first about certain plot elements and slowly unraveled them.
Easily one of my favorites this year so far. I agree with the above post and would like to see Edgar Wright do a straight-up horror movie. Also agree about both of the leading actresses, Anya Taylor-Joy was good but Thomasin McKenzie was the standout to me too. Her character reminded me a lot of Emma Stone's from Cruella as well, in several ways.
Btw I had no idea Terence Stamp was still alive. He deserves a role in a modern CBM (either DC or Marvel) before he passes IMO.