I like how much work Japanese directors put into the pacing, atmospherics, and suspense of their horror films. This one is no exception. If you ever saw Kingdom Hospital and enjoyed it for the mix of suggestive spooky supernatural undertones clashing with rationalism and materialism thematically, then you might like this film as well. At first I thought this film would turn out to be something like 28 Days with ferocious infected zombies feeding on humans, but there is a much more clever plot line going on which I won't reveal. The plot seemed to have some holes in it til I realized what was really going on in the end. Mainly though, I enjoyed the mix of film with a suggestion of a supernatural influence in a materialist or rationalist world. Visual storytelling gets this idea across with images of, for example, swings swinging on their own near the hospital, or an old crazy lady who sees her dead relatives in mirrors staring at her reflection in a window looking like an apparition. I must say that after discovering Japanese thrillers and horror films, it is hard to go back to Hollywood offerings for sure. They seem so predictable, tame, and cookie-cutter in comparison.