I started watching this drama after healer, because i was suffering of the fact that it finished. at first i wasn't impressed, because i don't really like it when the main character is a little older, but i forgot about that after the 1. episode already. now let me tell you how awesome this drama was. what made the drama outstanding for me were many things - first it was a very brilliant idea to make a drama about a man with split personalitys, i personally think, it's hard to act as many people at the same time in a drama. but you really believed that the personalitys are different. of course you know it's the same actor or person, but i didn't get that feeling while watching. - which leads to my second point: the acting. i don't know how to put it in words, how awesome i think the acting was. ji sung pulled the characters of so great and believable. you start to recognize which character is coming out, the first second he looks at the camera. I never saw a actor so awesome until now. - the characters he portrayed were so lovable. there wasn't even one of his personalitys i disliked (well i've got to admit i didn't like se gi at first. but after a few episodes i felt so bad for him, that i started loving him) - the plot twists are amazing and so creative, that i had to catch my breath. i expected a little things, when the hints were given, but what they made of it was so much more shocking, than what i thought of. - i kinda suffered of second-lead-syndrome again, but in a way that made it not awful to watch. i really really loved the second lead, but i didn't want him to be together with her. it didn't made it less hurting at the end (i cried so much), but i felt relieved, that he still accepted it . At the end i have to say this drama made me feel worse at the end, than healer did. Because i still have to look for a new drama and hate that it ended, but i really feel like i lost a good friend, the moment i watched the last minute. Please please watch it. You definitely won't regret it, because so far it's one of the best dramas this year.