I know that my rating is choking for this drama lovers but let me explain : the story was good and the cases were solved intelligently but at some point their was repetition as in every time one the main characters is in danger and the other one is going to save him  thus in the end some of the events were predictable.
the highest rating for me goes for the acting and the cast :the chemistry between the main actors was great and  I fell in the love with Han Woo Tak from the first time .Despite that I've enjoyed myself watching this drama I wouldn't rewatch it because the hole story depends on how the events change surprisingly and every thing is solved in the end therefore you wouldn't enjoy watching it again if you knew what's gonna happen from the beginning .