I really liked this movie. It wasn't super complicated or thought provoking but what it lacked in substance it made up for with style. Park Seo Joon is a favorite of mine. The more I watch of him the more versatile his acting seems. Kang Ha Neul is new to me so I'll be looking for more of his works. The friendship between the main characters is what makes this movie awesome. The chemistry between them is on par with Gong Yoo and Lee Dong Wook in Goblin. The fist bump had me rolling. They hit on some very deep dark problems but didn't really explore them. But that wasn't really the point of the movie. I don't really remember any of the music so it wasn't really great or really bad. Truthfully, the osts in general rarely stick in my memory. It's a great movie for a good laugh and good fighting. I'll probably re watch it later when I need a laugh.