Great for someone with a damaged spine
I work long hours at a desk.  A nice modern ergonomic office chair helps but sciatica type pain still occurred.  I had scoliosis fusion surgery 44 years ago.  The vertebra that were not fused are heavily worn and unstable after decades causing significant pain from the spine to feet if I sit for hours.  The purple ultimate seat cushion together with an orthopedic office chair work well.  I can work 12 hour days without serious pain.
Rating: 5 stars