What I can say, I totally loved it!
This was my first Assassin's Creed game and now I'm a huge fan of the series. Graphics are incredible, plot and person are interesting and I just love how game touches the history.
Many say that Brotherhood isn't as good as AC2, but I disagree. I liked this more, so much that I used to collect all treasure and things after the game itself.
Offline-mode without Ubisoft account is also good to have.