I picked up the grey bonded leather chair a few months ago and it has definitely made a difference in having to sit at a desk for hours at a time. The chair is comfortable and the rollers move freely. If you need added lumbar support I recommend placing a small pillow at the small of your back.
Comfortable even after sitting in it for hours on end. Easy to fall asleep. Chair is eight months old and still as comfy as day one. I would prefer more direct connection on the back of the chair to the seat. Back rest is attached to the arm rests alone which have a little give when leaning back.