Though technically cheaper at Argos by 50p, GAME actually have the Wii U version of One Piece: Unlimited World Red in stock. And they're throwing in a bunch of extra DLC too. In his extensive review, Jon said that OPUWR was "easily one of the best anime tie-ins ever developed. Fantastic fan service, satisfying combat, deep town creation and crafting, dozens of hours of content and exquisite visuals make for a compelling lengthy experience that's more Grand Line than Grind Lane."
So if you're a fan, consider this a must-buy.