I wanna address 3 things

1.) Plot/Story
2.) Suzy's acting
3.) Cast


Plot/Story
The plot of this show was really good. It was very unique, adding a punch of fantasy to a really good 'supposed' legal drama. It sounded stupid at first, but it blended really well, and the outcome was outstanding. It didn't fail to deliver in terms of being real enough for a legal drama, and not normal enough for a fantasy genre. Credits to the writers of the show and the director. And for whoever was in charge of casting that really cute corgi. I'm giving it a 9.5 to the story just because they failed to further discuss how they had their powers in the first place.

Suzy's acting
I'll be honest, Suzy isn't my favorite actresses. She is pretty, but she isn't that good in terms of delivery. For scale, my favorite actresses in order are
Han Hyo Joo
Shin Min Ah
Park Shin Hye

The acting of those 3 are far and beyond Suzy's current acting now, but she is in no way near of being classified as a bad actress by a lot of people. I would give her a rating of 7.5-8/10. If you want an example of a person who is really bad at acting, but is just overly hyped because he/she looks hot, look at Nam Jo Hyuk. I would rate that guy 3/10. Monotone as fuck. Suzy delivers during emotional scenes, and she makes us smile when she tries being quirky and cute during feel good scenes, but what I don't like about her acting is the regular flow. In scenes where there is no clear emotion, neither happy, sad, thrilling, or funny. Just the plain old, 'boring stuff' as some call it; the normal scenes that are explaining the plot of the show, she fails. She feels a bit awkward in those scenes for me because she doesn't look to convincing of a character. Her acting was far better as compared to Uncontrollably fond, but she still has work to do as an actress.

Cast
The cast was really good in this drama, particularly the main 3 characters + kim won hae. Lee Jong suk, is a shoo-in (we all know he's one of the best actors of Kdrama), Suzy has been discussed already. Jung Hae In, the adorable second lead who was so phenomenal a lot of people had Second Lead Syndrome once again. Would honestly watch another show where these 3 are in it. To further summarize my choice of Kdramas to watch is actually pretty simple: I see Kim Won Hae, I click. I get that his name isn't hyped enough to be cast as lead in a drama, but he sure does good whenever he's a supporting character, never failing to make us laugh, and on this particular role, cry.

Overall, I would watch this show again, even with one of the best plot twists i have ever watched.