This game has the best graphics of any game I've played so far. There are three cities: Jerusulam, Acre and Damascus, and supposedly they tried to keep the cities historically accurate, and what drew me to the game was the medieval graphics. It was beautiful, the cityscapes were breath-taking.. and there were extremely satisfying moments assassinating people, and then walking away pretending to not know what's going on.
Like many other reviewers, several of the tasks were repetitive, but not that bad. I had not planned to keep the game, but in the end, I had quite a bit of fun and adventure doing it, that it's going into my Xbox 360 collection (which consists of Halo 3, Beautiful Katamari and Mass Effect (a Christmas present from Peter))
It was quite a ride. I would recommend it.
It's heavily story-based, so if you're not into that kinda games, don't do it.