Okay so I first heard of this drama when it was airing but I did not know if I was going to like it so I just watched it this past week. Here are my thoughts:

The story line is incredible, you go from the present to flashbacks/dreams of the past and it truly amazes me how everything in this scenes is truly important to the development of the characters. While the ending may be disliked by a few I think it is the best ending the drama could have had.
Characters:
I can say that I am not surprised I became attached to all the good characters, from Man-wol to fourth choice. I literally loved the chemistry between the two 'couples' that came to be during the drama. I was truly captivated by how well this characters where developed throughout the story.

I think once my heart has settled back down, maybe a year or so down the line I will come back and re-watch this drama because I do think is worth re-watching.

If you are looking for something that will have you on a roller coaster of emotions and will keep you up all night than this drama is definitely worth watching!!