Absolutely mind blowing. Tightly written. Thoroughly researched. Each and every character has a role to play. Nobody is left out. The writer has introduced certain number of characters in the beginning and that's all the story revolves around. Not sure how people aren't able to understand Han Juwon's POV in this whole drama and the circumstances he had to face in life to come off as this highly rational person who doesn't give two cents to emotional attachments. It's an absolutely crazy chemistry of Shin Ha Kyun and Yeo JIn Goo. No scene is ever put in this drama for cheap thrills. People have to pay attention to that.