I believe it was a ratings juggernaut in Korea when it was broadcast. Other networks delayed release of their drama's as to not compete with it. This is one of the greatest tv shows i have ever seen. I have seen it at least 3x and own the box set. One aspect i like is how we come into this drama in the world of the children who will grow into the adult main characters for the entire show. Sets quite a backdrop. The acting is top notch.. the production is top notch.. there was nothing about this drama i did not like. (endings are not always the bests but the ride is worth it) Fictional story based on a real person. One of my all time favorites. Discovering Korean Movies and TV has opened a whole new wonderful universe of content. Sure you probably have to read subtitles, but after a few hours.. i didn't even notice i was reading them. Great watch! 10/10!