Well, I think it's worth the money. It is also longer than part 1! GoW2 still looks strange though, Kratos looks physically brighter and his facial expressions look like he's on Prozac or something... But I'm glad they brightened up the environment throughout the game. The game looks a bit cartoony though, unlike part 1. But GoW2 is still worth the money. 
And if we have to start over on all of our powers and weapons in part 3 I'm going to be pist. But then again, it's obvious that they probably do that. >.>