I really wanted to like this drama. It is a story that should have appealed to me, because I am in that age group as FL was, but it was so actually more frustrating. The relationship between ML and FL was at times very mature, they talked over important matters, but at the other times it wasn't, probably for sake of adding more episodes to the story. The drama behind their break up was ridiculous, as was evident when they got together again. It would have been better if they actually showed them struggling toward their mutual goal, rather than doing that sudden hope losing and separation thing that didn't serve any purpose, because it defeated the point of all the talking they did at the beginning of their relationship.
The SML disturbed me a bit because he verged toward psychopathic tendencies, and by all means he could have been a perfect SML who had it all - brains, looks, humor, and even a baby to share (well, if there wasn't a mom already around even though not present). By the way, the Do-a's Mom character was important in highlighting the issue not very much talked about, the postpartum depression. Kudos to writers for talking about women issues rarely shown on TV, but sadly that alone does not make a good storytelling.
What actually annoyed me the most, was that here we had a story about 40-somethings and they all behaved as cringy teenagers - barely touching, holding hands, and keeping decent distance. There was no romantic tension between FL and any of her possible love interests - they all could have been her siblings for all I saw here. Only one kiss and even that one was timid. The only actually quite sexy scene was when I-Sang was caught taking his shirt off by her mother, and the director was probably planning it purely for laughs! Do not misunderstand me - I did not need steamy scenes like those in Love to Hate You (I wouldn't have complained though), but more chemistry between leads would have made a lot of difference in my seeing their relationship as realistic. There was so much possibility to make that happen. For example, when ML and FL were finally alone together at B&B, SML saw them through the window holding hands and smiling at each other. Seriously? The scene would have been so much more powerful (not to mention more realistic) and painful for SML if he saw them hugging and kissing as real couples do.
Except for those annoyances, I liked actors, both Go Jun and Jang Na Ra, and side characters were interesting too. There were no villains and no evil plotting (except by screenwriter himself). The first half of the series was imho better, as the second half went into overdrive with all the unnecessary melodrama, but I am not sorry for watching this through. It was quite pleasing to see women and men supporting each other, and actually talking over important issues. If only there was more chemistry as would have been normal for relationships between adults, and if only there wasn't that superfluous drama in the second half, it would have been a great show, especially because of some valuable life lessons shared both for women and men.