{DISCLAIMER} This review is based on my personal opinion that may differ from others. Thank you for understanding. :)

Kang Ha Neul and Park Seo Joon had some of the best on screen bro-relationship I have seen in a long time. I generally enjoy action films that don't have a romance put into it, so my rating might be high that others. Both main characters had a solid background that worked for this film and you didn't really question the action or require more in my opinion.
If you don't enjoy films with blood, you may not enjoy this one either. I like how the director was not afraid to show blood and wounds.
Another thing that I truly enjoyed is that 'Midnight Runners' hits a very serious problem that occurs in the world, but is not widely known about. And even though this is quite the serious matter, the writers have decided to put humor into it and make it a little less heavy and more digestible.
The ending was the one you expect at the beginning and even though I have seen my fair share of film, TV series and dramas (and kid of hate expected endings) I was very content this film ended the way it did, which is probably also a reason why my rating is this high. :)