I am Big Horror movie fan. I watch every thing which is horror. And I just wonder if The Grudge is not one of the best Horror movie then which one is ??? If you name "The Autopsy of Jane Doe" or "The Witch", then I will say they really don't fall in fully commercial genre and slow burner. The Grudge is genuine, authentic and highly scary movie. This is most underrated horror movie and needs to be in top league.
I have yet to come across anyone who says they were not scared to the core while watching THE GRUDGE.