I wouldn't call it an excellent game, but it was a little underutilised. There was a lot that they could have done with the game that they just refused to do, instead making it repetitive, and making half the game fighting using a crappy combat system.
That makes it sound like I dislike the game. I don't, I like it very much, because the parts where it shines, it is excellent. I am keeping an eye on Assassin's Creed 2, because it looks much better than the original; they've improved a lot, it seems. Yet another game to buy this holiday season...on the list with Uncharted 2, Modern Warfare 2, BioShock 2...all number 2, lol.