There's a reason this movie dominated the Korean box office over the holiday season. It was more popular than Night at the Museum and many other American films. It accomplishes many things that recent Korean romantic comedies have failed at. Basically, this movie is the star vehicle for new actress Kim Ah-Jung. She gives a great performance and fits the role perfectly. Even though the plot is simplistic, it is very witty and provides consistent comedy. The movie does not take itself too seriously like a lot of Korean movies that are all like "OMG LET'S BE FUNNY FOR THE FIRST HALF AND MAKE IT ALL DEPRESSING IN THE SECOND HALF!" While it provides many laughs, the story is still touching and meaningful. And what's amazing is that Kim Ah-Jung did all of her own singing, despite never having sung in a movie before nor being a singer. The soundtrack for 200 Pounds Beauty has topped the charts in Korea and "Maria" is one of the most popular songs in Korea right now.
Since this is basically my first review, I want to emphasize that I wanted to write it because no Korean movie has touched me this strongly since I saw My Sassy Girl.
I highly recommend this movie to anyone who wants to see a satisfying romantic comedy. 10/10