The art style is pretty fine, but the artist definitely has same face syndrome. I couldn't tell apart the crown prince/king from his best friend/guard.
Love the translation! You can tell the translators really care about teaching Korean history.
One thing that bothers me, is the fact that she was said to be unable to give birth, but has three children. It was never explained how...
I honestly stayed for the plot. Personally, there's too much smut for my taste.