I bought one of these from another retailer, only to find that the Kinect did not fit the top plate of the mount... It did not click in place or fit securely.
So I gave up on it and just plonked the Kinect at the base of the TV, which was hardly ideal.
But then I saw some of the reviews here from people who said they contacted Orb and got a replacement that worked. Apparently the issue was down to a small number of incorrect mounts going out, which was why some people said it was awful and other people said it worked well.
I contacted Orb earlier this week via their website and via their Twitter account, and received prompt replies from both. They apologised for the issue, and promised to send me a replacement top part for the mount.
It arrived on Friday via Royal Mail 1st Class Signed For, and... it fits! My Kinect is now mounted securely on top of my TV.
It's not as good as the mount I used for my Xbox 360 Kinect, but it does the job. I may get a different mount in future if I see one I prefer the look of, but for now this one is sufficient and is a lot better than just having the Kinect at the base of the TV.
I cannot fault Orb's customer service, either. They were excellent, fast, and helpful.
Contact details for Orb -