The only reason I'm getting it is for the coop. I have a friend who has not shut the fuck up about the game for like 3 months. I'll get it to play the game with him, sure. And he's one of those people who rarely buys any games whatsoever, so this is one of the few chances to play a new game with him.
Gears has always been a game I found to be hard to enjoy. On one hand, the action is solid, the Locust are pretty tough and there's many different kinds of them, some levels feature some pretty interesting gameplay design, and the campaign coop is highly enjoyable.
On the other hand, the story is almost non-existent and the characters are almost universally unlikeable.
Although it's a decent game "where it matters". I won't bother taking the rest of it seriously, story/characterwise. I'll probably only pay attention to cutscenes or dialogue to marvel at how godawful the characters are.
So it's a reluctant yay for me.