one of the latest reviews (i tried to include the url but amazon didnt like that) says that it works just fine. im thinking about getting this and then using some velcro or 2x sided tape to make sure its secure.
it will definitely not work with kinect, and it does not work well with ps3 eye either. the kinect mount which sadly is much more expensive, attaches to the mount points on the back of the tv and is much more secure. this is a very cheap plastic clip which is basically an attempt to cash in on the newness of the move, i gave up trying to get it to work and used one of those 3m double sided sticky pads from a hanging clip and that works very well..
I wouldn't use this for Kinect. I did. Now I have a scratch down the front of my TV. This doesn't anchor down the Kinect. So when you start your xbox or plug the device in for the first time, the kinect adjusts itself and if you aren't holding the cable back or tying it down, the whole contraption will fall forward off the tv.