This show is funny, dark, badass, and grips you really well. The first three episodes might be a bit slow but the fourth episode is where the action and the stakes really kick up with one of the best twists I've ever watched. From there it's a nonstop action thriller with just enough romance to get us invested. The villains are brilliantly written, and I love Song Joong-ki's portrayal of Vincenzo. He plays such a raw antihero where at times the audience even doubts whether or not he's a good person. It's so intense and the plot is so well-threaded. I can't say anything bad about this, great ensemble cast, brilliant musical soundtrack.