Very crazy movie. Ji Chang Wook is a great actor. I mean ... let's be honest, this was INTENSE. I wonder why people are complaining about character development. I don't think this movie was really the type who wanted to explore different personalities. The action was great, the direction, the production - superb. The story nothing new, at least I have seen something like this before. I was constantly wondering why Ji Chang Wook was considered their "leader" when everyone else had great skills (hacking, building drones), the main lead's skill was driving a car and saving others. But well, it was a two hours action packed movie and, like I said, it was not supposed to be a character study. At least I didn't feel like something was missing. I enjoyed every second. The villain was over the top, but in a good way. It's a while since I got so shocked and excited because of a movie. Hollywood could learn something from Korea.