If you're looking for a drama with historical background with a poetic touch, beautiful costumes, a fight to reform the old conservative mindset and a hint of action? This drama is perfect for you.
Its a little slow but it fits all the 20 episodes perfectly. What pulled my attention was the costume design and the details put into each were just so refreshing and totally seem as if a lot of thought was put into it. The drama is visually and aurally mesmerizing but the storyline isn't that impressive. There were a lot of situations where i could predict easily.

However what pulled me towards this to watch every was the amazing performance of Park Eun bin. Her character involved a lot of emotional burden and she executed it perfectly and definitely expressed that women are capable to do anything.
Yes I watched this because of Rowoon but the romantic plot didn't really catch my attention.
Okay but I fell in love with Choi Byung Chan though (He's one of the reasons that I dont regret watching this XD)

Hence I would say if you just want to pass time, feel some action and inspiration, maybe a little bit of comedy and a cultural history of korea you can give it a watch!