I really love this drama! This was the drama that made me start watching k-dramas! Once I started watching this drama I could not stop. I watched all the 8 episodes that had came out at the time in one day, which led to staying up until 3am... I hated that I had to wait one week for new episodes every week, but the wait was always worth it (at least for me).
I really liked the plot, even though there were times when you could see that the probability of what had happened in the drama happening in real life was 1:10000, but I think that's part of the drama's magic. The characters were great, Song Joong-Ki and Song Hye-Kyo had great chemistry as well as Jin Goo and Ji Won. I really liked Minseok's character as well as Onew's. I also wasn't expecting Onew's character to develop the way it did and to show a such an emotional, raw side. And I have to say that I was pleasantly surprised by his performance. Overall, I loved this drama and I definitely recommend it!