FP insoles actually work. Do it at home: 1. EGG test - wear your FP insoles until they warm to your body temp, then drop eggs on them! 2. Impact test : Drop any type of round object like a pool ball,bowling ball, skateboard wheel, handle of a screwdriver etc and compare to any insole. 3. Glass test: if you're feeling up to it, get some sheets of glass cut at your local glass store and try it on solid concrete.