This is one of the best action movies I've seen in a long time! The plot is great - although it's not the most original story ever, it's very suspenseful and cohesive with a good resolution. I really liked the action scenes as well, and the visuals used for fighting in the dark (you'll see what I mean when you watch it) are super cool. Actually, the entire film is pretty visually stunning! Ji Chang Wook was excellent as always, and the supporting cast were amazing too! I always have a soft spot for female hackers (especially Min Ja from Healer) and Shim Eun Kyung was a good choice for the role. Shoutout to the main villain for being super creepy as well... a little too creepy, haha. Also, I loved how well the team worked together. You could really tell that they'd known each other for a long time through the game, and I got a lot more attached to them than I usually do to action movie characters. The soundtrack is extremely good and suspenseful, and reminds me of the music from TRON: Legacy, which is very fitting for the video-game-feel and urban atmosphere. The only complaint I have is that I couldn't find a decently subbed version online. If my local theater showed it I would have gone to see it multiple times...but alas I live in the US midwest :( I requested it on both Dramafever and Viki - if you use these sites please request it too and maybe they'll give us a nicely subbed version... Overall: if you have a soft spot for Ji Chang Wook, action movies with excellent plots, and/or tales of loyalty and uncovering corruption, this is the movie for you!