At first I was a little unsure about this game, the start is a little slow but it becomes such an amazing and mechanically detailed game.
The stealth mechanics are amazing, introducing new ways to manipulate the environment, lighting and landscape to create more options with stealth gameplay.
My favourite detail is probably quite overlooked, when you throw a smoke bomb, certain enemies will actually try to clear out of the smoke to stop themselves from being assassinated, this gives the NPC's a more interesting play style and opens you up to trying new and different methods of attack.
I would highly recommend this game.
Judge the game on your own thoughts, not the opinions of others.