Acting
Everyone played their part perfectly, Han Sohee and Park Heesoon were magnetic in their roles. I was less convinced by Jiwoo's partner but it might be because I had a hard time not associating him with his Yumi's Cell character.

Story
The beginning episodes were engaging and left me feeling intrigued. The action scenes were so well done with the flow keeping it understandable but still intense (even though they have the getting-stab-but-totally-fine trope going on). There wasn't much suspense about her father's killer by the middle of the series as the captain was too obvious and no other suspect had been introduced by then so the plot twist wasn't that impressive.
The relationship between Jiwoo and Choi Mujin was the show's highlight for me with this blend of hatred and love, trust and mistrust between them. However, it was the only thing that I cared about as Jiwoo's character is nothing beyond her revenge, so I couldn't care less about her relationship with Pildo which was really out of nowhere and out of character for me. Big eye-roll for the ending, the logical outcome of the final fight would have been a nicer ending but well...