I use this chair constantly while in front of a computer editing photography. My back and neck no longer get tired or stiff and it places my arms and hands at just the right height (I'm 5'3) for my keyboard. No more leaning forward onto my desk. I have more energy when I am done working for the day!
I bought of of these chairs for work and home and, due to spinal stenosis and I feel like they take a lot of pressure off my spine and I can rock from side to side to keep some flexibility during the day.
I"ve been using this chair for over 15 years now. I've replaced one from wear and tear and have bought another one to have at home. Improved my back pain, posture and core! Love it!