I think you have to sit on one to get an idea if it suits, I bought a human scale diffrient world chair with a mesh base which was comfortable in the showroom but once I sat on it for a day my skinny arse sit bones were acting as one point of contact and pushing the mesh down so it touched the base, I’m only 68kg and a fatter person with more padding would have been fine. I returned it for an orange box Do chair which is great, adjustable arms and base with tilt settings and a movable lumbar support on the rear mesh.
The aeron chair didn’t do it for me.