The drama shines with realy well written characters, amazing acting and a nice spin on a lot of classic cliches. Definitely one of the better KDramas I've seen over the years.

However it has one big problem, which is a running thing in the vast majority of kdramas: It focuses to much on the Problems. At the beginning it was better than kdramas usually are in that it split the screentime more evenly, but after around a third it dropped into the usual split, where 75%+ of the time aren't spent showing how a problem is solved, or how the characters working on it might solve it . Instead thosee 75%+ is just spent to show us the problem from different angles, how it came to be etc. creating an overall negative experience while watching it.
And while this shows is still one of the better korean ones in that regard, all to often problems still just get solved out of nowhere, with maybe a 30-60 second explanation on how the solution came to be tacked on later.