I have mixed feelings about this drama. I enjoyed up to mid-point, then got a bit bored, and frustrated up to episode 19, then returned to enjoying it again, partly because we had finally arrived to the end of a seemingly long drama. The drama revolves around relationships; there is not much that happens in this drama other than the interrelations between the various characters, especially between the parents and children amongst themselves, and with each other. There is no crime to solve or mission to accomplish, nor is there a lot of comedy. There are two parallel and similar stories: the early and lasting love of the two parents who met in their youth, separated, married different people but meet again 30 years after; and then there is the strong budding love between their children. In my opinion the major issue was the writing and editing. The two central story lines competed with each other, and the writing was lazy, when it needed to be creative and interesting given the task of the central plot. This was evident when the story started to really drag out and then seemed to stall, and you got bored because of repetition of theme, ideas and frustration that the story wasn't going anywhere. The pace was too slow, and even the dialogue seemed to be delivered with deliberate pauses and almost monotone. By the end I felt 20 episodes of what? Far too long it could have been completed in 12- 15 episodes; this probably owing to those 4 to 5 episodes where it felt like the drama had stalled. The four lead actors did a very good job in portraying their roles, to be expected from veteran actors Jeong Jin Yeong and Lee Mi Sook, and the wonderful Jang Geun Suk. JGS and YA played role of the parents when they were young in the 70s and the role of their off springs 30 years later, and were very believable and strong performances. I was impressed watching Im Yoon Ah, and the supporting actors did well and delivered decent performances. The music was an interesting mix of indie, cool jazz and some quirky music which seemed to fit the movie, in most parts; nothing stood out for me. What was good? The concept was interesting, the recreation of 70's look and feel was well done and effective in distinguishing the two time periods; the acting was good, and the portrayal of the two relationships was also very good. Jang Geun Suk and Yoon Ah had good chemistry, looked great individually and as a couple so the eye candy helped. I watched this on Viki.com, where you have viewers post their comments during he drama. This was one of the most packed commentary from start to finish, and it was interesting to see that there was a general sense that it was good and interesting to begin with then got stale and boring as it progressed. Many viewers were torn between their loyalties to the young couple and the parents, as main protagonists and this lead to frustration with the drama. There should have been one central story which is supported by the sub plots, characters etc. What saved this drama for me, was the Jang Geong Suk and Im Yoon Ah! I loved their characters and story, that's why I was generous with my rating. If you don't like 'relationship' dramas then this drama is not for you. If you like fast paced dramas or action avoid this.