So well-written that I couldn't wait to get my daily dose of this Kdrama. The writer was masterful in moving characters from problematic behaviors to more acceptable behaviors. Acting was outstanding. In particular, Jung Chae-yeon who played Mi Yeon and Kim Kwon who played Moon Sik were engaging and so believable. Their roles, IMHO, were particularly difficult as they had to portray extreme changes in behavior during the drama. Well-directed and truly addictive. These longer dramas are much like American TV dramas so I like the fact there are so many episodes. I think it probably appealed to many as the romances are multi-generational. Some of the younger characters, e.g. The twins, were charismatic and, hopefully, will appear in more Kdramas in the future. What I like about all Kdramas is that they mirror current societal concerns in South Korea: high rate of alcoholism, bullying and overboard interference of mothers-in-law and this series touched on each of those topics. Coming from a family of eight children, the roles of older and younger siblings were, IMHO, portrayed accurately.