It's difficult to talk about why I disliked this show without spoilers, so I'll keep it short.
The story itself is interesting as a concept, but the development is virtually nonexistent. Usually I get sucked into dramas and want to watch one episode right after the other, but for this drama I could end the episode 20 minutes in and come back later. I understand that most of the characters are trying to be psychologically developed, but all I saw were a bunch of 5 year olds running around. The love line was awkward and I couldn't get into it. The father is the most natural character, and the butler is hilarious - those are the only 2 characters that skidded me to finish this drama. There are SO many loopholes that it is almost painful, and there are too many people that are easy to hate. The editing in general bothered me every episode and the amount of repetition that happened made me feel as if I were going to go mental myself. The music was usually awkward or unusual that I didn't know what I was supposed to be feeling throughout it. Overall, while the actors and actresses themselves did their part well, there's nothing you can do if the character is poorly developed alongside poor editing.