It had a lot more humor than I'd expected. The poster looks perfect, a really good choice to my taste but don't let it fool you.

What I liked the most ...
* romance it's not all over the place. It could ruin the show but it's nothing like that
* side characters are strong. You'll be surprised in each episode (Jang Han Seo, you'll have a special place in my memory)
* If you are willing to see, there are a few important life lessons. Like unity from strength, choices you made kind of thing etc. Which raises its rewatch value for me
*It is dark and humurous at the same time. One episode you want to rip your hair (or that character's lol) the next you have a huge smile on your face
* OST. IS. SO. COOL.

What could be more...
* a season 2 please!