I really enjoyed this show and I'm looking forward to another season. I will say I was a bit disappointed with the ending. Please stop here if you don't want any spoilers...

I was really disappointed who ended up being the villain and that his father was also killed. Just when it looked like the relationship between the ML and his father was finally coming around, the father is murdered. So the ML had no real family by his side anymore, just the crazy, lost-her-mind stepmother who treated the ML like crap his whole life. So the ML, Jin Isoo, lost his mother at a young age, then his father. It's kind of disappointing that the writers didn't leave him with any good familial relationships, except his secretary. I would've liked it better with a different villain (like the step-mother), and at least leaving the ML with his father and step brother. Also, I didn't like the way the father let his wife treat his son like crap, knowing what he knew.

Other than that, I loved the way that his involvement as part of the Violent Crimes Division evolved as well as the funny, comedic bromance and I actually liked that there was no romance involved. It is definitely rewatchable if you're a fan of Bo Hyun!