Watched this drama several years ago, and from that time on, i watched it more than a dozen times. It's one of my all time favorite. This is where i learned to love Kim Soo Hyun. His acting was incredibly superb worthy of an award. Kim Soo Hyun and Han Ga In were perfectly matched in this drama. They owned their characters so well that you can exactly feel how they felt each moment of every scenes. There were so much emotions and drama, i felt each characters heartache, fluttering moments, funny moments. It was a roller coaster ride as an audience. It was a blend of tearjearking scenes, thrill, excitement, a lot of funny moments and a whole lot of love moments between the two main leads, love between close friends, love of a family, unrequited love, one sided love. It was like the writer has put all the genres in this one drama. And all the casts, even all the antagonists, all portrayed their characters so well, that none of them was a waste of time for me. You hate if its a hateful character, you love if its a lovable character, and i think thats the essence of a true drama masterpiece. And the ending... it was unexpected but satisfyingly worth the wait. It was not cut short just to meet a deadline. Special mention to Jung Il Woo, who, just like Kim Soo Hyun, made this drama perfect.