Okay, It's a decent review up to the end and here's why.
First of all, why waste your time reviewing a game that everyone who would be interested has already bought? Assassin's Creed 2, Brotherhood, and Revelations are out already and 3 is on it's way. There's no point in reviewing a 5 year old game.
Second, I'm glad you put the pros and cons and they felt pretty spot-on, although I think you're being too kind to the combat by calling it clunky. Arm-bitingly awful is probably more accurate. Also you forgot to mention that it takes waaaayyyy too long to get to the actual assassination contracts despite them being the best part of the game.
Finally, 9/10? Seriously? This game has HUGE design flaws, many of which you pointed out, and it was enough to distract from the fun and I know many people despise the game. I personally think it's alright but if a game as clunky, broken and flawed as Assassin's Creed gets a 9/10, we might as well go back and give best title of 2011 to Duke Nukem Forever.
Anyway, you have the ability to do decent review blogs, however this one was as flawed as the game you were reviewing.
-1
(PS: Yes, I know my opinion is subjective, but still, NOT 9/10)