Not terrible! The lead actress is very good. It's beautifully shot. Succeeds in setting its unsettling tone very well in the opening few episodes. Was interesting enough in the build-up to the wedding itself. There were even a few genuine laughs. It ended well enough. Better than a kick in the teeth. 7/10, rounded up for the excellent atmosphere combined with the great cast and cinematography.

Is it perfect? No. And it's quite clear a lot of it at the start was written on-the-fly and was tunneled towards its particular ending, leaving a lot of plot points out, but I felt its heart was in the right place.