Give this a quick read:
http://www.penny-arcade.com/2007/11/14#1195073220
I don't want to go into why I like AC so much, but let's just say that I'm very pleased. I meant to just stick this game in and play for a short while, but I ended up playing for about 3+ hours. I just put Mario in so I could get at least a half hour of play out of that, but I fully intended to split the time between the two, but AC really hooked me in.
Ignore any negative reviews for this one, and at least try it out somehow. The game gets better as it goes on as well, at least to me. It's not the best game ever, but it's certainly one of the "must-play" games of 2007. I better play as much of this, and Mario, as I can before next week, because then I'll have that blasted Rock Band game also...and I still want Bioshock, COD4, Smackdown vs. RAW 08, Fire Pro Wrestling, Mass Effect, and AGHHHHHHHHHHH, too many games right now!!!