I'd like to get one, but at $750, it is way too expensive!
If you think the cost of prevention is expensive, wait for the cost of the cure.
I highly recommend workrite desks...
http://www.workriteergo.com/products/sierra.aspUpdate; Nevermind, I see that only the electric desk goes up to 48" in heigh. All the others seem to be limited to 34".
(This is hacker news, no?)
http://www.theshelvingstore.com/Chrome_Wire_Shelving_s/34.ht...
They are available in a bunch of depths and heights and are easy to adjust. You probably won't be moving them up and down multiple times during the day, but can configure it to a comfortable height. They run about $100.