I've never worn insoles before until I tried out Spencos. I don't really have anything to compare them to. Is there anything better for me? How do the cheaper insoles for around $10 compare to the Dr. Scholl's custom fit? I've read a lot of reviews and it seems like it can go either way. As for my knee problems, it's nothing really serious, I know I just need to stretch and strengthen my quads and hamstrings, but I know a little more cushion will help. If I play 2 days in a row, they are a little sore, but nothing unbearable.