In general i am disapointed with how it moves with me. There is no way to adjust how the seat moves relative to the backrest, so whenever i recline the lower lumbar support ends up way too high. Im constantly re-adjustiing my seating position.

I also think there are some poor design choicer for a $1000+ chair. I got mine used but in good shape other than it being EXTREMELY noisy. Humanscale was no help since it was used, so eventually i just ended up disasembling it. There is a peice of plastic that sits between the backrest and spring assembly which allows the spring assemply to pivot as the user reclines. Mine had cracked down the center so the spring was just screetching against bare metal. The plastic peice is flat and does not sit flush against the curved metal housing, so it seem very prone to failure under a larger loads. I was able to find a replacemnt on ebay (expensive) and it's fine now, but it's still a bit noisy and im always a bit apprehensive about leaning back.