I’ll start by adding that I don’t pay attention to music so I gave it a 5 because I can’t say if it’s above or below average.
Anyways.
So first, let’s talk about the plot. People praise it for having a strong plot line, but really there’s so many plot holes. Like why would the villains decide to kill his mom when they could’ve kidnapped her? What was going on in their brain to make them think he would just stop because his mom died and not be even more motivated to get revenge… That’s just one example, there’s plenty.
As for the comedy, which is supposed to be dark comedy but really the show is just a mix of action and forced funny moments, it’s very meh for me. Some moments I laughed at, but as I already mentioned, there’s also some parts that feel very forced. Also wtf was that scene where the pigeon saved him?? I mention it now because I assume it was meant to be a funny scene, but really it felt stupid.
As for the characters and the actors portraying them, I think it all could’ve been done better. For Vincenzo, they should’ve chose an older actor with a more mature/rough looking face. Song Joonki’s acting wasn’t bad but his face really didn’t fit the role. Also Vincenzo’s character was way too overpowering, like he always had a plan for everything and seemed to almost never listen. It took away from the suspense because you could always trust that he’d get out of the problem he’s in. As for the villains, they seemed to just be there for comedy, like a cartoon villain, which would be fine if not for how smart Vincenzo is. The female lawyer villain carried her team, it’s amazing how stupid everyone else (and even her at times) was. Like really, how hard can it be to kill one man? Even if he is a mafia, he still has a limit. As for the female lead, I don’t have a problem with how energetic she is, but she literally did nothing. Her only purpose seemed to be giving the two male characters (main villain and male lead) dimension. It was always Vincenzo’s plan, she never came up with a helpful or vital idea. It amazes me that she was a top lawyer defending such a problematic company and yet she acts so stupid when working with Vincenzo.
The pacing isn’t great either. It should’ve been a few episodes shorter, I think, because the first few episodes are really slow and the last episode was filled with villain deaths, which should’ve felt satisfying but there was no suspense to them so they felt empty.

Overall, not the worst thing to watch if you have nothing else to do, but I wouldn’t go out of my way to watch it or recommend it to someone trying to get into kdramas because it’s not that impressive (if anyone is trying to get into kdramas, I’d recommend Mr Sunshine, My Mister, Sky Castle, Hymn of Death, Hotel Del Luna, and Mr Queen).