Anyone who knows my tastes in dramas knows I don't really do historical dramas due to the politics. I generally just find politics BORING! However, a time travel, and a comedy? Now *that* I can get behind, politics notwithstanding! :)
I'll be straight up honest - I watched this for Shin Hye Sun, one of my favorite actresses. I've loved her in everything I've watched her in. And she did NOT disappoint. Frankly, she carried this drama on her back, and I'm so proud of her! Her comedic timing was impeccable. Her portrayal as Bong Hwan in the Queen's body was perfection! The mannerisms and everything were just utterly perfect. Even if you don't normally watch historical dramas, I am going to wholly recommend this one. Due to my usual avoidance of historicals I was a bit confused in the beginning - all the ministers and their roles and deeds sort of got jumbled in my mind, but by the second half of the drama, when the action started to amp up, I was well and truly invested and things began to clear up and I was enjoying it even more.

Kim Jung Hyun as the king did a good job - his role was really just to complement the queen I believe. While they could have chosen someone with more gravitas for the role, I feel like he worked really well with SHS and the chemistry between them was good. And maybe that's why he was chosen - because this was really Shin Hye Sun's show and they didn't want someone stealing the spotlight from her. So for that, he was a good pick. I enjoyed the 'good guys' side characters and appropriately despised the 'bad guys' side characters. As a whole, everyone should be proud of their work on this show.

The music was nice, and I enjoyed it.
I would say if you are a 're-watcher' that this could make a good re-watch. Even knowing the ending, the comedy was still gold and I would almost assuredly laugh at all the hilariousness again.