I'm enjoying the game. I really love the art style, the colors, and just the overall aesthetic of the game. I guess it doesn't hurt that I'm a huge sucker for sci-fi and this game is really just nailing all the sweet spots.
In terms of the graphics, maybe I'm just being unrealistic, but I kind of think the textures are shit in places. Like that kid in the beginning of the game (particularly his face). I just notice textures being washed out or low rez here and there. The game looks really pretty when zoomed out. When you get those side angle shots (when you are scaling walls), or when you have a city backdrop behind you. It also looks great when you are in shadowy areas drenched in light colors.
I have GTX 680 2gb SLI setup, and everything is running smooth as butter at 1600p resolution. Getting 100fps + (although it sometimes dips to 75, and sometimes up to 114). I'm sure those with better CPUs and better OC have better results.
I need to play the game more before I comment on the gameplay/level design. So far I love the fighting, and really enjoy the platforming bits. An I am really sucked in by the story. So we'll see how this goes 5 + hours into the game.