I am answering with very practical information. I have a very hard to fit foot so I generally live in a cheap tennis shoe that I can cinch up and am comfortable in. I started to have leg problems and inverted in "The Good Feet" orthotics....expensive and my DH almost croaked....LOL!, but they work!!! I've worn them about 7 years now and wear them daily.....no more leg or foot problems. They come in sets of three so that I can wear an arch support in my tennis shoes and slippers, too. I also bought a pair of Dr. Scholl gel inserts for women and they are not bad either, but then, I don't wear them every day......maybe every two or three days.....I don't buy expensive tennis shoes....mine cost in the $50-$60 range and I wear them till the soles get worn down. You have a hard decision to make. Hope my experience helps