Half a metre off the floor is too low, ideally it should be just above the TV. I think minimum MS say is 0.6m, which is pushing it anyway even by official guidance.
My play space isnt the biggest, but I stand around 6-7ft away and Kinect has never had a problem recognising me or the GF.
I shall try this when I wall mount it. I didn't fancy precariously balancing it on top of my tv
![Stick Out Tongue :P :P](/styles/default/xenforo/vbSmilies/Normal/tongue.gif)