Just finished Gears 2 this morning and I can say this.
If you are a fan of the first you will dig part 2.
The first game's graphics (IMO) set the bar on what next Gen games should look like.
They were improved in Gears 2.
Complains were made of the lack of story and length of game play from Gears 1, well you get more of both in part 2.
People loved the curb stomp from the first. You get a bunch more unique kills.
You also get a better variety weapon choices and different game play from the first. Riding a Brumack was a blast.
I also found a new addiction in gaming, it's called hoard mode, Way cool.
So like I said if ya liked the first Gears then you won't be disappointed with part 2.
Big on part 3 baby!