Being a so-called veteran actress, being older (therefore, wiser), and beautiful does not equate to being a good actress...
I stopped watching it because it got boring after watching the female lead's (FL) limited acting abilities. I feel that Song Hye-Kyo, FL actress, has the same facial, body, and vocal expressions and demeanor that never changes from one role to the next role she plays in...
Jang Ki-Yong, the male lead (ML) actor, is an extremely talented actor that outshines Song Hye-Kyo's acting.
In fact, Park Bo-gum the ML in a previous show The Encounter that she was in, he was outstanding, whereas she was again a no-depth actress.
Same for when she was in Descendants of the Sun, absolutely a bland and boring actress, whereas Song Joong-ki was exceptional and multi-talented actor that carried the show.
In her next drama she is in, The Glory, which is a revenge type drama, I hope she tries to learn a bit of acting skills beforehand where she can work at the same level and instinctively with her ML, the very talented Lee Do Hyun.