Beware that you need to "try" these chairs, and you need to pay attention to clothing when you try them too. A chair that's super comfortable with jeans and a winter coat might turn out to be an absolutely horrible back-twisting wedge of slipperiness once you're back home in sweatpants and a hoodie. Or in various more advanced states of undress.
absolutely horrible back-twisting wedge of slipperiness
I put a blanket over my chair. It seems to work.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.