G4 gave it 3 out of 5, so I don't think so. But then again, that's what they're people think. If you think it is, then I say get it...but also get other good multiplayer games to go along with it, like Halo (generic, but has really fun online matches) or Gears of War 3. So then when you and your friend beat it, you'll have more to do than just play the co-op campaign over and over again.
Truthfully, it's not worth getting any game system for a single game (unless you're incredibly rich). If there are multiple games on it that you want, that's when you should get it.