Varidesk, yes, had that.
I had one at work, and my wife had one too. They are sturdy, easy to use, and the design is pretty good. But standing for long periods is not that great; many people find it uncomfortable after awhile, and standing still doesn't burn calories much faster than sitting. That said, sitting for long periods isn't all that great either.
Wife now has a treadmill desk, which she loves, and I cope by spending less time in front of a screen -- since I am retired and all. Though I do spend quite a bit of time standing in front of an easel now. Go figure.
And now, speaking of less screen time... // logs off //