A unique show but the pacing sucked... or better said there were pointless long scenes where I kept waiting for something else to happen and after just thought: Someone forgot to scream CUT! They obviously didn't have enough material for 60 episodes or found it hart to write a well rounded 40 minutes episode (or maybe there wasn't enough money).
Overall I never watched a season (of anything) in which so little happend (but I still enjoyed myself). I still liked the drama and want to see season 2 but there where a lot of episodes where I thought "come on, get a move on!!" It was sometimes so slow that till the very end it felt like a build up... And I kept on waiting (and was excited) for things to really get going/play out.
In season 2 I hope for faster more focused pacing (now that the world, characters, relationships and so on are established). I liked no LOVED the action (the choreos) is this drama I just want MORE of it! And more development/twists.

For once I liked most characters and - even though it didn't seem like it in the beginning - there aren't as many annoying characters. And I generally noticed that dramas in which the main character is a guy - there are almost never any of those annoying, delusional, jealous female characters. Because they always appear to be a (annoying) challenge to female main characters.

The acting ranged from bad (but mostly only a few guest appearances) to very good. The main actors acting was good for his first drama (he relied a bit heavily on his eyebrows - though it was very entertaining :-)) I will miss him.

The music stood out mostly through unusually beautiful background tracks but sadly also through overdoing it with one or two songs on two or three episodes. Because the was one song wich was a bit stupid and overplayed - could have been used a bit more modestly BUT that was only a few episodes. So I really liked the background tracks (wish I could find them on Youtube) from the songs I liked a few and didn't like a few - which is normal for me.