I bought my MBT's a little less than a year ago, as I am a nurse who walks a ridiculous amount for my job (I work 12 hour shifts, and walk roughly 10,000 steps or more according to my pedometer!) I had been getting some quite severe back and knee pain after my shifts, and getting up in the morning was torture, I was in so much pain! My MBT's do seem to correct my posture, so my knee pain has gone away, and my back pain has really improved! They are expensive, (I paid $225 for mine) but completely worth every penny. I bought mine thru Amazon.com (just go to that website, and do a search for Masai Barefoot Technology shoes) I've also seen them listed on Ebay. Next, I want to try the FitFLops that I've seen listed on Bath & Body Works, kinda like a summer flip-flop version of these shoes, has anyone tried those? they actually look pretty cute!