I tried all the herman millers (and other brands) the one that was most comfortable for me was the Sayl chair.
The best thing is the amount of adjustments for the arms, and takes less space than my last operators chair.
I'm happy 🙂
For me it was the drivers being unreliable, On Mac OS then on Winddows 10. it was over a year ago so there maybe better drivers now.
My advice try and get from maybe Amazon that has free returns if you too find it flaky.
found it 2 grand. yeh nah, hehe https://www.back2.co.uk/haider-bioswing-560-iq-chair.html?srsltid=AfmBOoqaNrEUlo1hvrkQprG4uankGoI5c0iTDAxbndHALWqvw1GLNZI5