With Wii MotionPlus playing Grand Slam Tennis, and also with Sports Resort is a completely new experience. It's really awesome. However, I wonder, just like many others: why not now so Nintendo? This little extra adapter must be purchased separately and would have been intigrierbar also from the beginning ...
If you look at the difference in the Grand Slam with and without controller to, we certainly clear that in future no longer be a sports game without it.
Despite these criticisms, my recommendation: Buy. It is worthwhile in any case!