My MDL buddy and I tandem watched this one. We both enjoy the main leads - Ra Mi Ran and Lee Sung Kyung and we agreed that it looked like it would be a good watch - we were not disappointed!
This was a very fast paced comedy with non-stop action. It really seemed like the movie just flew by. There was lots of physical and verbal comedy and it was nice to see an action movie with female leads. They both kicked butt in this movie! The plot isn't too "deep" even though the case is pretty serious (and very relevant considering the high profile cases that have occurred in SK in this past year). If you like buddy action comedies, I think you would enjoy this one.

RMR and LSK are both at the top of their game, eliciting many laughs and "OH DANG!" moments. Yoon Sang Hyun had a smaller, but no less comedic role as the husband/brother of the main pair. He had the knack for being totally useless to his family, but still essentially helpful at the same time.

This movie has some hilarious (and often very inappropriate! LOL) lines, and we just had a fun time watching it!
I will have to say that this movie deals with a pretty serious subject in reference to the case they are trying to solve, and it did invoke the feeling that women's issues aren't taken that serious in SK. Although, this movie shows that the heroines overcome this obstacle spectacularly. I would like to hope that the way they portray the treatment of women is just the stuff of movies, but I have a feeling it's got more than a little basis in fact. Regardless, it was great entertainment, and therefore I will give it a good recommendation! It's even better with a friend. :)