This is one of the best (if not the best) drama's I've ever seen. The quality of acting is AMAZING. Every actor/actress was brilliant, but I must say the ones who absolutely blew me away were the ones who acted as Kang Chil, Gook Soo (Kim Bum) and the bad guy - i forgot his name :/ I was able to laugh, cry, smile, and I was able to relate to the story line. There are some supernatural qualities to the story line, however it is incorporated so brilliantly that it just flowed smoothly with the drama. This is definitely a MUST WATCH DRAMA. If you are even second guessing on whether or not you should watch this... watch it. It is amazing and you will not regret it!!