One of the very worst.
I'm a South Korean and I watched this film when it came out in the cinemas.
It is a terrible film that not only fails to deliver its full potentials but also puts Korean film industry on reverse gear.
A true disgrace of a movie and bad film-making which is only made to rob people's pockets.
Korea has been making some excellent action pictures with actual stories lately, but this one has cheapness written all over it with some painfully unfunny humor.
The original comics (or Web-Toon as we call it) was nothing special (but popular as hell nevertheless), overrated even.
Korean fangirls flocked to see this film because the trailers put shameless amounts of Soo Hyun Kim's ripped body.
The success of it was almost guaranteed and I could see the studio ordering to make this as cheap as possible since the audiences will see it anyways.
The critics score was dismal and the audiences claimed it one of the biggest *beep*-yous they received in 2013.