Today, there are more electric-lift options with programmable heights: the GeekDesk Max, the NewHeights, and the attractive NextDesk Terra. I’m glad Mark found these: now I don’t need to worry that I won’t be able to replace my desk when the AdjusTables’ unreliable lift mechanism inevitably breaks.
[Or you could spend way less money and not sweat the measurements by buying one of these, and dropping a piece of plywood on it as a top. (I had just the piece I needed in the garage. If you don’t have such stuff in your a garage, IKEA sells tops at reasonable prices) I don’t mind the minor effort.]