What to say about this drama: The story begins from a veeery good idea and as usual the first "discovering" episodes are great and interestingly introduce the concepts. But the story is getting looong and loopy as the show goes on. Some characteRs else than the main ones seems not that interesting to me The cast is awesone. Be it Hyun Bin, and his amazing skills to change himslef into another self. I almost thought there were 2 actors. As for the actress, I did not know about her, she disappointed me in some ways but overall did well. Sung Joon as usual was very good and could turn himself in different character, which was really convincing! Overall this drama is worth watching but without too much excpectations as it's sometimes plainer that what we would like! I had a great time though!