I am not a fan of thrillers and do not like to watch violence on screen as entertainment . Too much gore in this film for me and yet I was compelled to watch all of it because of Ji Chang Wook as K2 , knowing that it will come good at the end whatever the story twists and turns of which there are plenty .
As an action film , it is not as good as Healer ( also with Ji Chang Wook in the main role ) . There are fewer bits when you can relax a bit and the romance is not as good either although sweet and moving in parts.
But there are worse and if you are a fan of Ji Chang Wook as I am then it will not be a waste of time to watch the series.