Better if watched before the new 'Kingdom' 2018 series, shows this movie could have been made better too, but the new series is so good that this movie paled in comparison. I don't know which one came first, but the series ended up the better of the two, by far. Still, it's worth the watch for any zombie enthusiast....and korean zombies even better. So if only have 2hrs to watch then this novie very good choice, but if you have 8hrs then go for the new series, 'kingdom', also korean language with subtitles plus season 2 just about ready I think...close maybe and S03+ not far fetched.
