LTTP but I just finished this game. I really did enjoy this game, it's probably my favourite AC although the cities are a lot better in the other games. It felt a bit like a RDR and AC mix. The naval combat was also surprisingly incredibly fun, absolutely the best part of the game.
Although I personally think this is a great game (I know a lot of people don't like it), it's still pretty darn flawed. Lots of game mechanics weren't properly explained like crafting and the assassins guild. I was seriously waiting for the game to properly unlock these features and explain them to me only to finding out I had access to them about half way through the game.
But the worst part, the ending. What the hell? I really liked where the story was going at the end of AC2 but wow, the ending was hilariously bad.
Anyway, enjoyed the game a lot, played it for about 30 hours and I cannot wait for Blackflag!