The Wii MotionPlus is a small, but fine, attachment for the Wii remote condition. The motion control is perfected, since the remote condition now three-dimensional thinking. That sounds complicated, but basically it's easy. Imagine a cube 4eckigen ago, only 3dimensional. In the middle is the Wii Remote condition, with the Wii MotionPlus bouncing recognizes the remote condition the middle position and can from then on all directions 1: 1 recognize.
In the supporting games this works perfectly, unfortunately, there are far too few of them. The best known are expected Red Steel 2 and Skyward Sword be. The latter being the only game that brings the Wii MotionPlus to the limits in terms of use.
I can only recommend the essay if you own one or more of the 20 supporting games. Only then will the essay brings something.