Well, I have had mixed feelings for this drama. I liked the idea of revenge, and I really wanted to watch it. It started nicely, I really enjoyed the first episodes. Then, it got kind of boring, and I thought of dropping it. I'm not really a dropper, so I just went on watching. Then it got interesting again, until a certain point, when they had to deal with many company matters, which, in my opinion, weren't really relevant. In the last few episodes, I felt that not much was going on. I think that they should have made it a 16 episodes drama. 16 episodes would have been enough. Even if it had 20 episodes, the ending felt very rushed, and many things were left unclear. The acting was amazing. Song Joong Ki did an amazing job! In the beginning I thought that he was not that great, but plain. And then, I got kind of annoyed with his character, because I never knew what he was up to. So, his acting was amazing, he really got in the skin of Ma Roo, who is able to do anything to get what he wants, no matter what that means. Beautiful acting! Moon Chae Won was also very good, I really enjoyed watching her, and how she changed throughout the story. Park She Yeon was great, even if I hated her character, somehow, at certain parts, I got to feel pity for her. Every actor with his character got into my heart. Lee Kwang Soo was amazing, I really liked his character, and I also read that he is best friends with Song Joong Ki in real life. I enjoyed the music, it was nice. Rewatch value? Hmm, I don't think I would rewatch this drama soon, because at some points it got me really bored, and I really struggled to finish it at the points. Overall, it was a nice drama, with a potential. Beautifully done, I really emphasized with the characters and what they felt. I gave it an 8