Honestly this was probably one of the best movies I've seen in a long time. While the film had just about every genre in it, the most memorable was probably the comedy. The action scenes were fun to watch and well executed but I was blown away by the comedic acting that Kim Soo Hyun presented. I never thought I'd be laughing so hard when I went to see this. Park Ki Woong was perfect in his role as a aspiring musician and also provided a lot of laughs. Lee Hyun Woo really was definitely the right choice for the role of the high school aged spy and his character's back-story was my personal favourite. Also the movie really showed the difference between idol actors and "real" actors in my opinion. I just can't imagine the movie being so good if they had used idols. The acting by these 3 rising stars was amazing and they just proved yet again how talented they really are. Although I would have probably liked a different ending, I walked out of the theater happy. In fact, when the movie ended I was simply left wondering when it will be released on DVD because it has a huge rewatch value in my opinion - and is the type of movie that I would make everyone around me watch ^^ I'd recommend this movie to anyone looking for a good action film or a comedy. While there is a little bit of romance, it is definitely not an important/big part of the story. Warning: this movie contains a lot of eye candy. not recommended for the weak at heart ;)