I have plantar fasciitis and have been experiencing sharp, shooting pain in my heels while I am standing on my feet all day at work. It is crippling. Once I started using these, I have not had the severe pain I used to have. My heels still ache at times, but it is a huge improvement from feeling like needles are being stuck in them. I love these so much, I have a set of these insoles for every pair of shoes, boots, etc. These do not slide up or wear down either. Some of the other Dr. Scholls products I've tried have not stayed in place or the gel has deteriorated, but these stay in place and keep their shape. I would highly recommend these insoles to anyone with heel pain!