I have worn MBT shoes for work for about five years. They have really helped with sciatica and knee pain. I am on my feet for 9-10 hours a day, moving constantly. This latest pair of MBT's are much like my last pair that lasted over 5 years. I didn't need to "break" them in. This pair is more roomy (I have wide feet and a high arch). My feet and knees really appreciate this comfortable, durable shoe.