It's an okay drama. Something to watch to pass the time, like finding one of those random shows on Netflix, because you have a coupla hours to spare. Draws you in the first handful of episodes then, drops you in a mildly entertaining barrel of suck...and you'll still watch.
Would recommend for those in between dramas or want to take a break from the regular fare.
I would not recommend to those new to kdramas.
Not worth rewatching, unless you want to see our elf prince in regular clothes. Great ensemble cast. Just wish those who were meant to be badass actually got to show more than once.