I'v e had plantar fasciitis for more than a year now but it has gotten worse after I did the Arizona Marathon in February of this year. I got in the draw for the Chicago Marathon 2017 that just finished a few weeks ago. I thought I wouldn't be able to run the marathon because of the severe pain I was experiencing in both feet. I tried other inserts but none of them worked. On June of this year, my husband bought me the Protalus S, just to give it a try. We thought we had 90 days to see if it works or we can return it. To my surprise, the Protalus inserts helped with my plantar fasciitis. I was able to finish the Chicago Marathon before the cut-off time without feeling much pain. I feel minimal pain now, and when I can save enough cash, I will buy another pair to replace my old pair of Protalus inserts. I am now looking forward to running more marathons and hopefully the healing of my plantar fasciitis. Thank you Protalus for helping me with so much foot discomfort every passing day.