I've had my MBTs for over a week now. I bought them at the strong suggestion of my podiatrist. My feet were in constant excruciating pain. Since I got them, while I wear them, I feel no pain whatsoever! Today I wore some Clarks with some prescription orthotics, by the end of the day my feet were killing me. I put on my MBTs as soon as I got home, my feet are already feeling much better. My posture is also much better when I wear the MBTs. The only downside is the price but well worth it given the difference they made for me. One of my employees bought some a few years ago for her planer fasciitis which hurt so bad she had to crawl about at times. According to her, the MBTs cured the pain completely.