'Hereditary' is strong horror fare!
I did find the opening half of the film the strongest, in the second half I lost interest ever so slightly and the ending underwhelms a tiny bit. It does, however, do impressive work in creating an unsettling environment to tell its story - there are one or two moments that did surprise me, a lot.
Toni Collette gives a brilliant performance, one that I couldn't possible pick any holes in - top stuff! Gabriel Byrne, Alex Wolff and Milly Shapiro are worthy of praise as well. They all manage to add so much life and believability to the plot, even towards its more fantastical conclusion.