I love oriental films, I watch a hell of a lot of them, and I am used to the slow plot and think this generally adds to the suspence. This film, however, took it a bit far, I enjoyed the story, but it was too long and slow. It was dragged out more than was needed, and this just added to the ambiguity of the story.
It's a shame, if it were compressed into a more reasonable timescale, I would have enjoyed it much more.
That's not to say that it was terrible, I'm glad I saw it, and don't shun it purely on this review, just don't expect it to be really exciting.