First and foremost: THIS GAME HAS TERRIBLE DRM, courtesy of the great satan EA. It will require you to register your game using an EA account, and will require you to log in everytime you want to play. If you do play while logged in and you get signed out of EA, THE GAME WILL DROP YOU LIKE A HOT POTATO INTO THE MAIN MENU.
That having been said, it's a fun enough game. Mindless shooting galore and explosions are continuous thanks to crisp controls if you have a 360 pad. Don't expect any depth in the gameplay, even with the upgrades and whatnot. Though the story's setting seems polished enough, the game's repetitive and predictability squarely puts it into your library's "play once and never again" category.