It comes with a free derp face
Remember that rumored skin that changes Riley the dog into a wolf for Call of Duty: Ghosts? Well it's real, and today, you can grab it for $1.99. If you order now, it comes with a bonus derp face, free of charge (timed exclusive).
Oh, and I almost forgot the "best" part -- it's exclusive to Xbox for a limited time! As an aside, the skin changes Riley into a wolf strictly in terms of the killstreak bonus during multiplayer play.