[pmontra]

I tested one in November.

Very narrow field of vision: I had to fish for objects turning on myself and looking up and down. Not good for AR.

No black, obviously. They can't block light from going through rendered objects. This in turn makes colors somewhat ghostly.

Very stable. Once I get an object I can walk around it and it stays there like a real one.

"Clicking" on an object is hard, but maybe it was hard with a mouse when I used it for the first time.