"I've purchased two MBT shoes recently to replace the MBT's I bought several years ago. When they went out of business for awhile, I tried substitute shoes. But there is no substitute for MBTs. I have an artificial knee and a fused foot. With MBTs my joints are cushioned like shock absorbers. My posture is better. My energy level is higher. I sleep better and get more done. PLUS, I do not use my orthotics with MBTs. These shoes may have been designed scientifically. But their effect is almost miraculous to me. I feel stronger, mentally sharper and can walk longer with no fatigue. I would highly recommend them to anyone with feet or knee problems. And if you don't like them, Footwear etc. will take them back no problem and no questions asked. And I know why-- because MBTs are that good."