When I first watch this drama, on episode 1, I was shocked by the brain surgery scene. Even though actually I was aware of it, since this is a medical drama about neurosurgeon. But by the time, I was used to it. While watching this drama, I really feel dynamic emotion. On around episode 7/8, I really hate all the characters and even think about stop watching.. But actually I hold myself and keep watching, hoping that it will get better on the next episodes. And it actually is! On the later episodes, I really feel this excitement of waiting for the next episodes. I think it's when the love line between Kang Hoon & Ji Hye starts to grow. Back then, on the later episodes, I actually can understand the reasons behind all of the character's irritating and annoying behavior. And eventually I start to like the characters as they got better. The story: there's not much Korean drama that have this kind of story. To be truthful, I am kinda interested in semi-documentary drama like Brain. I used to watch Surgeon Bong Dal Hee which is also a medical drama. Maybe that's why I watch Brain in the first place. But the romance in it also hold me to keep watching this. Overall, it has a great story. The casts: for the casts, I think there's no one can play the role of Lee Kang Hoon better than Shin Ha Kyun. Arrogance, selfishness, obsession, everything that was the part of Kang Hoon's character, was expressed very well by Shin Ha Kyun. On the other side, I think Ji Hye's character is a bit weak. Choi Jung Won's acting doesn't really caught my eyes. Even though, she managed to have a good chemistry with Shin Ha Kyun. As for Lee Sung Min (played the role Go Jae Hak), I have to praise his acting that successfully made me hate Go Jae Hak so much. The soundtrack: for me, no particular song that stands out. Sorry to say, but in my opinion, the soundtrack is just average. It did helps to bring the mood on the drama. But besides it, it's just average. The rewatch value: I can't say that this drama is bad (if it's bad, I would've stopped watching it in the middle). But for rewatching it, maybe I wouldn't. Overall, this drama is good for whoever wants to be a doctor. By watching this drama, you can learn about responsibility towards a patient, and even a commoner like me can learn a lot about neurosurgery. One suggestion, don't watch this drama if you're afraid of blood (just like me on the first episode).