Hmm, when this game came it out, it was so hyped. The ps3 didn't have that many tittles, and everybody was waiting for it...so bad.
Then you get to play it. And it's stunning. That first city, it's so cool....and then it gets small, and the faces on the street all seem the same. running up those walls looks so cool, and easy, and it all feels so great....and then you run it again, and oh look, another tower to climb. oh boy, the game must get a bit less repetative then this right? New features here and there perhaps. But no, what you can do at the start, is the same as the end. You'll get new weapons and stuff, but that'll be it.
The problem is, the game looks so good, and feels so good, it doesn't really try to hide the fact that it's just so empty. There's a few things you can do in the game, like collect flags, and kill templars, but that is about it. Killing inocent people is forbidden, and killing soldiers is too easy. And because of some seriouse gameplay issues, such as a bad targeting system, and the fact that you drown in a puddle, makes that game a bit too boring at times.
The visuals are great, and once the game progresses, the levels grow, but there's just so little to do in the game, that you'll get bored fairly quickly.
The story is good, but not great. It all feels a bit rushed. The only really cool thing about this game, is the main character. And that would basically be it.
My advice, buy the game for a cheap price, but don't expect the best game of your life. Play it a few hours, every few days, and it'll feel nice enough.