The plot was pretty good and well thought out. I like that the FL did not give up her revenge halfway. My only problem is that my OTP wasn't the FL and ML but the FL and the villain's husband. Anyway, I am okay with how it turned out.
The acting was mostly good, but there were still some instances of good old Korean shouting. That said, the facial expressions were very on point and the director was quite clever to occasionally focus on it. The cast's clothing was also quite good, especially Yeon-Jin.
The music was good and brilliant in some instances.
Overall, the drama is worth watching and rewatching.