How do you feel about the Good Feet brand? Are they worth buying? Do they help support high arches?

I had really bad lower back pain and my left knee was shot due to an accident some years ago. I was told arch supports would help but was kind of skeptical, especially because of the price. But after going in, trying them and buying them...I'm very glad I did. Without sounding like some sort of Good Feet cult follower, I got their "Exerciser", "Maintainer" and "Relaxer" supports and after a full day of wearing the supports my back pain was gone. The only problems I have now is when I don't wear them. I know it doesn't work for everybody, but it worked for me. My suggestion would be to try them and see.