The more I look at this, the more I think I want one.
I have a lot of trouble sitting still for any extended length of time. This has gotten worse, I think, as I’ve increased the number of hours per day I spend walking. I don’t like to be sitting still unless I’m really concentrating on something important (or just playing The Sims or something like that). I think having this little cube would help me out, at least partially, when I have to sit for a long time and can’t really move in any other way.
Edit: backed it. I should have a cube in December!