I had my doubts but they really work and work well. I had ball of foot pain on one foot after wearing worn out running shoes. I first tried new running shoes with better cushioning and got some improvement but not much. I then tried 2 different gel inserts from Dr. Scholl's and again some improvement. I kept seeing this pop up ad on Facebook for Protalus and finally decided to try them.
I initially had doubts because they seemed to have less cushioning than the inserts they would replace. I purchased a pair of M100 for my running shoes and ET 75 for my dress shoes. Like the directions said at first they would feel like the arch was too far back and they did but the directions said this was normal and to wear for a couple of hours. I did.
The next day I wore for a few more hours particularly during treadmill walking. I noticed a significant drop in pain. By day 3 as I write this the discomfort is virtually gone. Others had stated similar results and I am no longer a skeptic. They are WORTH IT! Thank you Protalus.