I disagree politely. Since tossing both pairs, my feet feel way better. I had walker and hiker models. Both were fitted to shoes/boots I own. For three years I walked with them, and had sweaty feet, with bunched up toes. Basically, the deal I think is that they took up too much space in the shoe! They were not flat enough! Most shoes have thin insoles inside.
Last summer, I ended up hiking in Chaco's due to those &^%$(*& S.Feets in my lightweight boots. My feet were chewed up, my toes were forced together too tightly. With them gone, and the factory ones back in, my toes lay where they should! And hence, no toe blisters. Had I tossed them in 2004, I'd not have suffered in 2006.
Ironically, my trail runners cost me $25 at Kohl's. And they do fine on 10+ mile days with factory insoles.