This movie was nothing short of amazing. The acting was on par, the storyline quality, the flow and character development extremely good. I was mostly impressed by actress Kim Hyang Gi that I didn't know at all until I saw her in this production. The entire cast was awesome, but my favorite character was the advocate Hae Won Maek played by Joo Ji Hoon. The movie addresses family matters, hardship of life, the notions of good and evil, the feelings of inadequation and guilt. It reveals our imperfect human nature, and makes us reflect on our own existence. This movie is so filled with emotions. I found the different hells very original visually, however the weakest point for me was the CGI at times, that looked rather cheap and messy. But it was overall very delightful and very well deserves its position as one of the biggest hits in Korea's film history.