How can you improve on perfection? I'm dubious. I've had mine for over 15 years and will never part with it. I had it refurbished 3 years ago and it's still great. It made a huge difference in my life. I had back problems and severe repetitive stress problems. The chair makes a huge difference for me. In particular, it allows me to have a tilting-forward position. Also, the mesh is extremely comfortable without trapping heat. It's pure genius.