The art style in this game is incredible.
I recently finished a play through of the game without killing anyone, and it was one of the best experiences in a game I have had. The story line has lots of twists and gets your immersed. The soundtrack to the game helps this too and makes you almost feel as if you are the main character.
The only thing I have against this game is the length, as it doesn't go for long enough. Although the replayability and different challenges make up for this.
I'm just hoping that the DLC adds a lot more to the game, and has something to do with the current storyline, and isn't rushed.
In conclusion you can tell that the game has had a lot effort put into, way more than games like Call of Duty that bring a new one out every year with minimal effort to the previous game.