*For the story I've got to start it by saying that there were Medical mistakes and the Med. part wasn't that strong but what I really like about the story is how complex the characters are and how interesting their psychological struggle...there's also 3 men in this drama who are the same person but in different ages (Sang Chul - Kang Hun - Seong Man) those 3 may betray each other, hate each other...make each other struggle but in time of need they stand for each other and protect each other because at the end they are the same person...I thought that to write those characters & keep them balanced you need to be a great writer...add to that...the supporting characters were really interesting...I found myself cheering for them and waiting for their relationships to grow. *When it comes to acting I really don't know what to say...it's Shin Ha Kyun the most talented actor ever...the short guy who's not so good looking but yet his smile makes me fly of happiness & his tears destroy me...his acting is real for me...once I watch him on screen I feel like I'm there with him in his world... I thought at 1st that this drama will be showing us how wrong Dr. Lee Kang Hun was in his methods & in seeking success...It's the thing I hate most in K-drama the perfect humans they portray (Like in King Of Baking) but this drama is not about that...it shows an imperfect man who's cold, arrogant and selfish...someone wasted the time he had with his mother and followed a stupid revenge - that was eventually against himself...yet this drama glorifies his unlimited ambitions...that's what i love about this drama...that at the end they didn't let him sacrifice his Ego but respected and protected him. *The OST was really good and fitting with the drama...the song Solitude makes me cry while listening to it even without understanding the lyrics...really good I also read that Kim Hyun Joong recommended the song Closer. *The reason I enjoyed this drama a lot was the characters and the acting...so I'll definitely re-watch it. *There's only a few kisses in this drama but they are good & the romantic scenes were touching...also the weakness of most Korean actors is crying scenes but it's a strong part of this drama...the way Shin Ha Kyun cries was destroying me...it was so good and so real that I wanted to hug Dr. Lee. :') *Hope this review was helpful...I'm really grateful I watched this drama...it's not that popular...but it was one of the best I've ever seen...just give it a shot...you might get hooked from the 1st ep like me ^.^