The story was not unusual and at times predictable but it really kept me watching with a lot of interest especially during the earlier episodes. Towards the end there were episodes that dragged out and got boring and felt, to me, like the producer was just trying to fill out the time to end up with 20 episodes. Definitely, I think they could have completed the drama in less episodes and it would have had more impact. The acting was not so bad except for the limited emotional range of Kong Hye Sun. I really believe she could have done better. From an audiece viewpoint, she was such a boring person. Her chemistry with Lee Sang yoon was very good though. Their younger versions did a very good job of fleshing out their characters making me want to get to experience them more. I liked the music in that it set the melodramatic mood. There's only one that I remember though and don't know if there was more. Overall, it is a drama worth watching if you are a drama addict like me.