Before talking about cons , let me talk about the pros of this drama.
The story : VERY INTRESTING AND FUN. It's so rare to see a reincarnation of a man's soul to a woman's body. And that's what made me watch this drama . I also loved how they kept the comedy genre till the end , as it is so rare to see a comedy period drama till the end. Usually in period dramas , the first 4 or 5 ep will have comedy/lighthearted moments and later as the story moves on it gets serious. Each ep will have at least one funny/lighthearted scene . Our MR.QUEEN changes the boring Joseon Dynasty into fun and entertaining . Our queen with bong hwan's body becomes "i am not like other women in joseon era" If you really want a good laugh watch this drama, its worth it!!

Cast/acting: 10 on 10 !! Shin Hye Sun , our queen was the show's spotlight , i instantly became a fan of her !! the way she behaved as if bong hwan was actually in her body!! So good , And our King, Kim Jung Hyun , he really gave me the king vibes !! his funny to a serious acting was so on top!! At one point i forgot that he was dong goo from waikikki S1, And all our villans were so good at their job in making me hate them (that's their point as villans) . Btw Jo Hwa Jin 's character reminded me of kang soo jin's character from true beauty ...you hate them at one point but them you forgive them (basically both of these character makes a bad choice and later realizes their mistakes and helps our main characters)
I especially wanna talk about out supporting cast like our court lady choi, hong yeon(court maid ) and their sibling like relationship with our queen. I love the trio sooooo much!!

Here is the con (spoilers!!)
But i really wanted bong hwan's soul to be in queen's body till the end , but the writers messed up i am happy that no one died except byung in , seeing bong hwan crying and smiling at the same time while reading about the joseon dynasty was so sad!! As soon as the soul changed during the last ep, the drama lost it's fun (for me) , It was so good till the half of the last ep. It was clear that our king fell in love with bong hwan's personality and how he feels off when bong hwan left the queen's body shows it. i was not satisfied by the ending basically . I loved so yong (queen) with bong hwan's soul and i expected that to continue but the writers thought that if they end it like that, it shows homosexuality and as it is korean drama they changed the whole story . This is my biggest problem with this drama .It was NOT a SATISFACTORY ending.

music: i only like the funny ost like bong hwan-a and keep going , others are meh to me.
I can only rewatch the funny moments in this drama .