Well honestly, It's okay. Its your standard American horror movie plot where an undying villain came across with a woman who avenges yet hesitates the moment she saw the villain. It's basically Butter on bread, plain, predictable yet just works.
If you're looking for something substantial and has depth, this movie wont cut it. Though I need to hand it to the directors for making the movie worthwhile but that's basically it. About the characters, most of them are shallow while some having a potential.
The end part obviously creates another sequel for the series. Just to make it short, don't expect too much on this movie, especially if you're the type of person that often watch suspense/thrillers from the Koreans and Japanese. Its Good but not Good enough to watch for the 2nd time.