after doing my research about what kinds of cushions are best for sciatica/herniated discs. i settled on this one. mainly because i was worried about buying a foam cushion and it being too squishy. with my condition, you need a firm support, and often, cheap memory foam gives too much and wears in. This has kept its firmness and i like the width too. its not too wide or too small, fits great in my car and my office chair. Good shape and good support, especially for the price. BUT i took off a star because of a major design flaw. the strap on the back is elastic, and comes already pretty loose. It didnt have a chance on my office chair and slipped down immediately. now every time i sit i have to adjust it and the pressure of my back keeps it in place. i will have to buy another pillow now to replace it. ..More