Like some previous reviewers have stated. You MUST do a few things correctly first before using this Kinect add-on.
1.) Clip the Zoom onto your Kinect and make absolutely sure you line up the lenses properly. Also, don't forget to put the protective plastic on between the Kinect and the Zoom if you are going to take it off and on a lot.
2.) After clipping the Zoom on THEN turn on your Xbox 360.
3.) Immediately completely redo your Kinect ID AND run the Kinect calibration afterwards. We used the cardboard calibration card that came with our Kinect.
4.) As some have said, under the TV and right on the edge so it can see the floor works perfect.
Done and have fun. Works great in our small living room.