I have to admit... I liked the way the demo looked, but I was fairly underwhelmed at the challenges. I went to get my pre-order at Gamestop and I was thinking of switching it over to Left 4 Dead or get Gears 2 instead (It's on the Christmas list... I just finished Dead Space, half way through Fable 2, and just beginning to tackle Fallout 3. My wife would kill me if I bought another game). I decided it would come down to whether or not they had the Banjo Kazooie XBLA codes. I was worried at first when the guy who gave me the game didn't seem to know what I was talking about. Eventually he said "oh yeah, that" and gave me one, so I gave the game a chance.
I'm really glad I did. I'm definitely having a lot of fun with it. It's a great change of pace from the involved and violent Fallout 3 and the stressful and violent Dead Space.
When I tried out Banjo XBLA, my wife cracked up at the voices of the characters. "I'm sorry dear, but that's the gayest thing I've ever heard... ever."