I have one in my office like the one my2 posted, only it looks like wood, not black plastic. I love it, you do know it only takes a second to pull it up for standing or put it back down for sitting, right? Get one, RANDY! Do it.
I faint if I stand for very long. So, I would not be interested. I think letting young children stand in school (when they want/need to) is a good thing though. I realized that while helping my grandson in 2nd and 3rd grade with his homework. He could concentrate better and longer when I let him stand at the table rather than sit.