I am a heavy pronator, and these wedges are a lifesaver! I use them in the heel, as well as under my first metatarsal. Along with some very minor boot sole canting, I've finally got a perfect set up! I feel the biggest improvement was putting a wedge under the first metatarsal -- this really helped keep my foot from turning outwards. No more sore ankles, and no more pinching. It also helps keep my skis flatter on the snow.
The quality of these wedges are excellent. They provide great support, with just enough give and cushion.
I can't recommend these enough! Thanks!