I have worn 2 or 3 pairs of Saucony Guide 9 so far so I already knew what size to get. I have supination problems with my feet and very low almost flat arches which is a weird combination as most flat footed people tend to pronate. I loved the Guide 9 but did some research and wanted to try a thicker shoe. I tried these and the first few days took some breaking in but now I LOVE them. My feet don't hurt, my feet stay level and I don't feel my pinkie toes sliding toward the distal edges of the toe box like all my other shoes would feel. I would eventually buy new shoes when a hole formed by my pinky toe. The Guide 9s eventually got that hole but how they supported my feet it significantly slowed the breaking down process of the shoe and soothed and supported my feet. These do just as good even better and the higher soles are pretty awesome too. For people with low arches that need extra stability it is definitely worth a shot.