I have been having heel spurs and plantar fasciitis issues for the last 8 - 10 months and have undergone multiple injections to resolve the issue with no positive long-term results. I ordered the M100 insole on 9/25/18 and have found a new lease on life. When I am wearing them I can generally walk pain-free and for a longer period of time than before. With time I am expecting the benefits to increase and the duration of walking to improve. I highly recommend the insoles to those having similar problems.