Beautiful cinematography, beautiful costumes, a lot of cameos, but that's it.
The backstories of some of the important characters are weak with several plot holes and the acting of the both main actors are weak or may be they are miscast especially IU. She was perfect in "my mister" but here she didn't convince me at all. For yeo jin-goo, I've watched hime in "the crowned clown" and sadly I'm not a fan of his acting.
The story is original (slightly inspired by beauty and the beast) but I didn't like it especially towards the end.
My favourite character in the whole drama is Sanchez :D