First of all I must say it was far better than I expected. In the beginning I didn't want to watch it because of summary, but I decided to watch. And I'm happy that I did. This drama definitely has its strong points and I can understand why a lot of people loved it. Without doubts it is a beautiful story of love, but it's better to say story of twisted destinies, how lives of main heroes were interacted. There are many interesting ideas which can make a person think. For example Jang Hye Sung's Mother said a lot of good stuff and of course the life of the main villain. Secondly, the cast is gorgeous! Don't understand me wrong I have nothing against Lee Jong Suk and Lee Bo Young, but I wasn't impressed by them. To say more I was a bit tired of them by the end of this drama. It was too much of them despite the fact that they are the main actors in this story. But the supporting roles were indeed magnificent. I love the skills that actors showed and it was a pleasure to see. I especially liked Yoon Sang Hyun (Cha Kwan Woo), he showed his character so well. He was serious but at the same time very playful and I fell in love with this character and then Lee Da Hee. She was simply awesome in her role of Seo Do Yeon. She showed progress of the character and so much passion. I enjoyed watching her a lot. And other characters too, but I won't mention them all. So the cast is definitely a spot on. But there are also disadvantages. For me there were a lot of situations where I understood it's just not possible. There are dramas where you also understand it but it is not so obvious. But I hear your voice isn't a happy case. So the overacting and overreaction isn't good. And all in all this drama is good, there's no doubt in that, but is it so great? I'm not sure, there are a lot of dramas which are worthy of attention, but they didn't receive it. And this drama received it so much, so that I had a lot of expectations and not all of them were fullfilled. But if you ask me whether to watch or not I will say: watch it. It's good, the cast is great, there are some interesting thoughts. So it's a good drama as far as I'm concerned. Btw the scene in aquarium was so bloody awesome!