I started having a great deal of difficulty with walking on concrete for more than an hour or two at a time. I tried all of the top athletic shoe and insole brands little relief from one to the next. I stumbled across these shoes in an act of desperation to avoid seeing a foot doctor. Nearly two years later, boy am I happy I did. All I can say is the cushioning and shock protection really work. I'm buying more before this style gets replaced.

As a side note, my wife first mocked them, calling them "snake shoes" because of the pattern. I persuaded her to try on a pair and, not only was she sold, she might be a bigger advocate than me now.  All I can say is, If you try them, you'll understand.

Update after 2 days:
After ordering a new pair, I realized that it was the TR3, rather than the TR5, that gave me so much foot joy.  Initially, this model seems a little narrower and rougher on the baby toes.  I will update again later.