The wrong chair has caused me all kinds of problems with my legs etc...
The best chair for me is :
That's the exact chair.
The ability to elevate my legs while working corrected issues I had after using
a crap chair for a few years.
I will cauiton that for some people this may be the worst chair; I don't know.
But for the problems I had with my legs a few years ago this fixed everything!!
My second choice is :
The problem I had with my legs is they got "water logged" and were bloated.
I'm so glad I don't have that anymore.