I've watched this series several times so far, not because there's a lot to discover with each rewatch but because it's a solid drama, well done within the budget constraints, and it balances well-loved tropes with some more sombre notes.

Things I liked:
* The story has two of my favourite tropes (emenies-to-lovers and accidental/forced roommates), which are are really well done. The boss/employee vs. tenant/landlord dynamics give good balance to their relationship. Overall the plot is a bit predictable but the characters' development and the interaction of the team members make it enjoyable.
* The team members were great, they provided both comic relief and an outsider's point of view for the developing relationship. They were also quite cute.
* Kang Woo Jung's acting was brilliant -- I hope he'll get the chance to act in productions of different genres, so more people will see him.
* Both lead actors seem comfortable with each other, which makes the intimacy between the characters believable. (It's sad that I have to say this -- but in some Korean BL dramas the actors seem so uncomfortable!)
* I also like that we get to see a glimpse of the struggles some gay men go through -- unluckily falling for a straight man, the fear what would happen if you're outed at work, how people will judge you for being with another man. Yoon Seo Bin was good at portraying all of these with a side of internalized homophobia. This topic was there throughout the show, sometimes just as an undercurrent, sometimes more obvious, but it never distracted from the sweetness of the romance plot.

Things I did not like:
* The acting of both main leads was a quite muted at times. Especially in the scenes when their characters argue with each other, I did not feel the emotions as much as I could have. I think stronger body language and facial expressions would help. They are both really good at expressing their emotions with their eyes, though, so it's not a question of talent -- either they just have to practice a bit more or the director did direct them that way. (Or is it something more ... chemical, at least concerning facial expressions? With the entertainment industry as it is, I wouldn't rule it out.)
* I wish the show would have made Jae Yoon's motivation for his decision in episode 7 clearer -- either by characterizing him better in earlier episodes or telling the audience outright. I think Jae Woon's actions come across as more tropey than it was intended.
* Also it would have been nice to get more of Ho Joon's backstory earlier and not infodump everything in one (though very heartfelt) speech.

All in all, one of the better K-BLs I've seen, and very comfortable to watch repeatedly.

[This is an updated version of the review I posted at Viki.]