I bought this particular mount with it being an officially licensed one. It looks very good and fits tight on the top of the TV.
Previously I'd had the Kinect lower down on my centre speaker and it was fine until I played Kinect Sports Rivals and my raised arms would end up out of view.
Mounting the camera on the TV solves this and as an added bonus I didn't expect. Having the camera at almost eye level has improved the voice commands. Kinect hears me every time I walk into the room and say the command 'xbox on'. It picks it up easily without me needing to raise my voice. Previously I would need to be louder and sometimes say it twice. Not anymore.