Was hopeful with this product.  I have fairly flat feet and was looking for improved support in my hockey skates.  The reviews online I read seemed mixed but with their guarantee I decided to give the Superfeet Yellow insoles a try.<br /><br />The Superfeet insoles are simple to use, just sized using footbed from my skates and then slipped into the skate.  Initially I was pleased with the result. Felt my heal was secure in the slightly raised position the insole creates and my blades were even on the ice.  I liked that raised positioning especially when skating backwards.<br /><br />The negative for me was in the knee. After using the insoles for @ 5 sessions I began to get knee discomfort that I did not have previously.  Skated a couple more times in the Superfeet but discomfort continued.  Removed the Superfeet and went back to the original insoles.  Pain went away and has not returned.  But the Superfeet have been....