This show is fantastic! Out of all the kdramas I've seen this is the closest to the Reply series (especially 88) in presentation & characterization, but at the same time this show doesn't push the love triangle in a stupid over the top way, which is a huge plus. I mean sure this one is set in present day Korea and it's not a 1-2 women + many guys setup, but the vibe is very similar.
All the characters, including the minor ones are interesting. All the sub-stories are cool. It's great how the drama starts, it's great how it ended and the quality stays consistent throughout. Normally I prefer dramas like WWwSK, or Fight for My Way, but this was a nice relaxing experience without the epic/cathartic moments that those kinds of dramas are known for. It was very funny, but not embarrassingly funny, It was just unreal enough to be interesting.

The casting is basically perfect, even more so than in R88. I hope that I'll see more of these actors in the years to come. The OST was good, though it could have been a bit less repetitive. +

Just to say some negative things: They took the fart jokes way too far and there were some dramaception moments that felt a bit immersion breaking.

Overall it's an easy 10/10, I hope it becomes a cult classic outside of Korea. Looking at the ratings leaves a sour taste in my mouth, I hope it's not because of the gay character, but with Korean viewers you never know...