Simply an incredible game with a very compeling story. I love the themes from the game and all the details added with things like the main screen whenever you launch the game. It feels like a very unified experience similar to the animus concept in AC1 in which everything was blend in together so it does not look like you are playing a game but more of a complete experience down from the menus.
It has lots of replay potential and I think is a must play if you like movie-like videogames and even in general, it is a must play game.