Aaaand... I love this game (Mario Tennis Wii U)! It plays like a sports game, with rules and best practices and all that. The 3DS version has a better control system through more moves, but introducing more moves also makes it more complicated. Overall, I might choose the Wii U version though over the 3DS version. It just has great graphics and is a good, solid game. The reviews are right, the modes are limited, more limited than a game like Smash Bros., but you just have to take things for what they are, a $50 sports game that achieves its purpose pretty well. My score so far: 8/10
While I won't score this game a 10, I'm pretty much a fanboy to this game.