Not bad. The movie failed to draw me in fully, this could be perhaps due to the cultural divide between east and west, but I never felt a connection with the characters.
Dont get me wrong, it does a decent job of evoking that response we all look for when watching horrors, it just fails to bridge the divide between an ok horror and a good one.
Good acting by all involved, plot is a bit difficult to understand at first and there are a few questionable actions by those involved to advance the plot, which kills emotional investment by the viewer, at least in my case.
It gets creative near the end and involves the audience in a way I have never seen before, so it definitely gets some points there.
In summary, check it out if you want a change and love horrors or if you are a casual watcher in the mood for a creepy feeling or two.