Thumbs up for me:
1) Story was good till the 12th episode. Each case was well thought out. WYW & KMS characters were well-written. Supporting characters CSY and DG were sweet which was greatly balanced out with the character KMW.
2) Park Eun Bin and Kang Ki Young's acting was realistic. They both played their part well and their mentor-mentee relationship was heartwarming. Special mention to Joo Jong Hyuk who played the negative role well but with short screen time cannot say his acting was stupendous.
3) Direction was pleasant, especially the silhouette proposal. Dialogues were engaging.

Thumbs down for me:
1) Story wise LJH's character was bland to be the main character. The usual mom trope just was disappointing. The quality of the story really dipped from the 13th episode.
2) The music was not pleasing to me. It is one of the main things which make me fall in love with drama. It wasn't bad but it was not impressive also.

P.S: I was going to give it 8 but cut 0.5 because how they started and how they ended disappointed me since I really like this drama.