The fuckery is its best quality. so if that doesnt appeal to you, the movie wont either. thought the plot twists were cool, in the wtf sorta way. i also like this movie as an alternative to the US-comic-book-adaptation trend. i thought captain america 1 and 2 were boring, safe, pieces of shit, for example. and Tilda Swinton, god bless her for doing this role, she kills it, damn near steals the film.
If you liked it though, Korean action films in general have been making entertaining shit like this for a decade.