This drama is really quite good! I was expecting it to be more of a romance than it was, though, to be honest. It is really more City Hunter/Iris-ish than, perhaps, Spy Myung Wol, or other romances masquerading under a serious premise. I give the story a 10 simply because it is SO good. The pacing of the story is good, save a slow last few episodes, and the romance is believable. It also has motives behind everything people do, for the most part. Quite a thrilling story line that goes well above what you think it will. I have to give the casting and acting a 9. The KOREAN actors were wonderful, and reminded me of the reason I started watching the drama in the first place- Ha Ji Won and Lee Seung Ki. And then I saw another actor I recognized from What's Up, and knew it was going to be great. But, as most dramas do, it had TERRIBLE white actors. Seriously, I don't know where they find their white people. They speak English, but it doesn't sound natural at all. The music was good. I don't have much to say about it. It never failed to fit the mood of the drama, and didn't suck, but it wasn't particularly memorable, so a 9. Rewatch value is a 9. I'm probably going to watch it again, but not any time TOO soon. I just have to give this drama a special mention because of the AMAZING lead couple. I know both of these stars from elsewhere, as you should too, but their romance in this is so convincing and deep that it has convinced me that they should just get married ASAP. Great chemistry. All in all, I recommend this highly :D