I've only seen them in other people's places, not actually placed them or played with them.
they LOOK a bit toy to me.
anyone making tall, window, screens? rather than stacking?
Agreed; I was never a fan of how those looked. And I've only ever used/seen them at other places.
I don't know of a commercial version of the tall style. We have some that we made ourselves. We also have several medium-height/shorter ones that we purchased from Kaufman-Astoria when they closed. I really like them, I'm not sure if they made them or they were some sort of commercial solution, but you can stick many together with hinge pins, and they roll, and the top portion is a sheet of plexi that you can position at two different opposing angles.