I found this movie randomly and on my own so I went in with no expectations.
I was pleasantly surprised by the comedy of the movie and I actually thought it was a pretty nice slapstick comedy. It was very easy going and I would watch it again because of the nice chemistry between the main leads and interesting plot twist. With that being said; the medical inaccuracies in this too overwhelming and the portrayal of Dissociative Identity Disorder are very stereotypical and not really accurate at all. If you know nothing of DID it is easy to watch but if you have even the slightest knowledge of the condition it makes it cringe to witness.
I also did not favor the ending. It felt like a really cheap cop out. Hypnotherapy wont just get rid of DID and trauma and allow her to re-enter society. There is nothing wrong with having DID and Gu Chang liked A Ni for who she was. It would have been better if they hadn't 'fixed' her..