EASILY better than that turd WWZ. Similar zombies, but far better made. Liked the performances, and the tight environment added a sense of claustrophobia to the proceedings (which is usually what makes zombies work in the first place, as far as I am concerned).
Though I must say, in terms of Korean horror films, I must give another recommendation from 2016:
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My personal favorite film of 2016, and quite possibly the finest horror film I've ever seen. It has flaws and has some room for interpretation, but talk about an emotionally draining picture.