To the music aspect, I honestly didn't gave it attention to it because I was so focused on the story. In my opinion everything was so good. The plot, the cast, the acting. It started so good that I had to continue, and I'm that kind of person, if the beginning doesn't impress me I would drop it after 2 episodes. But i think this is one of the few dramas that I've watched as soon as the english subs came out. It started great amd it ended great. Totally recommended if you like comedy, crime and action mixed up perfectly.