it's really hard these days to find good dramas with an action score. I was looking forward to this as Ji Chang-wook is a long time favourite (although I prefer his non-action roles), and Wi Ha-joon was promising in several roles, I really liked his mysterious criminal vibe in 'little women'

That said, after having watched the three first episodes: what a disappointment. I think the first 25 minutes of the first episode was just really bad fight and brawl scenes. And not much else actually.
I'm afraid it didn't really help that I recently rewatched 'my name' with Park Hee-soon as the most charismatic, evil and attractive drug kingpin EVER, with such authenticity it sent shivers down my spine constantly... so, seeing Wi Ha-joon now trying really hard to be an equal character? No chance. I can see him acting while acting here, maybe even trying to copy several things from 'my name'.

The storyline didn't really grip me, lots of fights, flat characters. Young guy wants to take over the area of the old boss guy, so far, so non-exciting.
Ji Chang-wook... I don't know, he is trying hard too here, but I don't buy his character either. All the cursing seems fake, all the smoking too, just everything.
I also don't like the whole atmosphere and vibe this show has.

If you want to watch a brainy, actually deep, and psychologically interesting and multifacetted story, see amazing aesthetic visuals and brilliant, authentic characters, main and side roles with intelligent action included? Watch 'my name'. If you want 30 minutes non-stop bad blood-spatter action and actually good actors trying really hard to fit roles they are not (yet) up to? Watch 'the worst of evil'.