Just watched it. Great fuckin movie, haven't seen a good thriller/serial killer movie in awhile, I thought it was suppose to be a horror film where it was suppose to be "scary." But this movie is a thriller, what serial killer movies have you watched that was "scary"??? IT was advertised the wrong way with that mask. But ah, didn't see anything wrong with the acting, I don't remember laughing. This was a fuckin great movie. I like shit like that, if you like this, check out Bonecollector with Angelina Jolie which was made a while back if you haven't seen that.
As for the grudge, haven't seen it yet but I have seen Ju-on, the original Japanese movie (The grudge is Ju-on except it's the American version kinda like The Ring and Ringu). It was aight, nothing great about the movie.