It's comfortable easy to put together and works as advertised however it doesn't seem to be meant for heavy daily use. I've had it for about a week now and the padding is already compressed. I'm using it to work from home 8+ hours per day and I probably should have gotten something a little more robust. If you don't plan on being in it all day it's good.
I have difficulty finding a chair that does give me muscle spasms. I tried the expensive bells and whistles chairs but didn’t work for me. Decided to buy a basic cheap chair - which I did and with a pillow I can use it