The game does not recognize movements very well. I was unable to complete the initial setup of my program because it will not let you continue if it thinks you are not doing the excercise properly.
Even maneuvering through the menus was difficult since the motion recognition was flawed. It thought I was moving when I wasn't and thought that I wasn't moving when I was. Sometimes it couldn't even see my hand.
You Shape: Fitness Evolved is a much better option.