This is my favorite medical drama so far.

Go kyung pyo is such an effective actor, he really makes you believe that he is the character.
I like that the first few episodes started at the prison setting and eventually making his way to the hospital which made it set apart from the usual medical dramas. I also like that there's no love interest because it usually takes away from the core of the drama.
One thing though, I thought that he's "special vision power" is unnecessary to be honest, I mean if you're going to write a character with a special ability, you better make sure that it plays a vital role and is used all throughout the series.