This drama got my attention a year ago, when a lot of details where unknow.
If i'm being honest with whom is reading this review the drama has a lot of problem: plot holes, oversused tropes, and other little stuff.
But the main leads are really good, they impressed me a lot, plus the CGI is good. they invested a lot of money on this with a good result. Plus i really like some director choiches.
So if you want to se a costume drama, i would reccomend this drama. It has lot of flaws, but is better than others drama with the same problems thanks to the good chemistry between leads and the direction. So, basically,i find it a good drama, with problems that you can find in other dramas too.