Just got the Model T insoles two days ago. I have flat feet, pronation, and mid-foot arthritis in my left foot. I'm also a night shift nurse working 12 hour shifts. This is my second night wearing these insoles and I honestly have ZERO pain in my feet! I used to have very bad pain in my left foot on the top where I have arthritis of those two large bones; plus the side of my left foot. None since wearing these insoles! Totally amazing!!!!! I plan to buy a second pair! Maybe I can actually wear nice dress shoes again!