I think this was a pretty clean and tidy series. In twelve hour long episodes it gaves us a very clean and cut story with a somewhat satisfying ending as well as positive messages and advice. However, while it was perfect in all matters technical, be it the actors, the themes, the flow and the writing, it felt lacking in unpredictability.
The ending could be seen a few episodes in. There really wasn't a question how this series would end, the only question was how it would come to that point. And I think the journey was nice, it addressed a few series themes like loss, grief and how a marital relationship can start and end.
The typical korean drama undertone wasn't a plus in my opinion. Overreactions and stretched out moments which are only minor detraction points. Suprisingly the dramatic situations and misunderstandings weren't too frequent to become annoying.
I think what we have here is a very perfect example of what korean dramas are like. Sadness and happiness in equal measures, a romance that leads to a happy and feel-good ending. Despite this, the predictability of it and the lack of twists with in-story weight (no that thing at the end doesn't count) made it an enjoyable experience, but not much else.
The messages while nice enough weren't valuable to me, and while there were some good twists and turns, I don't think I'll remember this as one of my favourites.
I guess I'm also not the exact target-audience. Married couples are surely hit more by everything there, but as a single the impact was lessend by a lot.