The beginning of the drama really ticked me off, because the characters were really jerks. I didn't know what to think when even the characters that I thought of as "good" guys were totally horrible to Park Shi On. However, that is what makes this drama great in the end. The character development is worth all the pain at the beginning. As the story progresses, there are reasons behind the characters actions. I'm not much for medical dramas, but this is so much more that. I didn't really think of it as just a medical drama. I thought it touched on something that is really important being the way people treat people with disabilities. Sometimes I think we forget that they are people with emotions just like everyone else. I have friends with children that are autistic and I hate the way some people treat them. I also love how Park Shi On helped the other characters heal and become better people. Joo Won is a great actor. His portrayal of genius, autistic Park Shi On is really well done. I don't think that is an easy part for anyone. I have seen almost all of Moon Chae Won's dramas and I find her acting to be believable. She didn't fail to be believable as Dr. Cha. I was really ticked at her at some points in this drama and I think that is due to her great acting abilities. The other actors were also good in this including Joo Sang Wook and Kim Young Kang. I adore Ko Chang Seok as an actor. He is really good in all the dramas that I have seen him in. It was cute to see a cameo of Park Ki Woong in the last episode. Joo Won and he must be really good friends. Too cute. The music is good and appropriate. I might rewatch this in the future. If you like an underdog story, then you can't beat this drama. I highly recommend it to everyone.