I bought this shoe to work out in and walk.  It takes a few minutes to become accustomed to the sole and the rocking, but it is a fast adjustment.  I usually work out about 45 minutes and walk about 30 minutes at a time.  At the end of the walk, I can't wait to take these shoes off.  My feet are achy and tired.  I don't know how some reviewers were able to wear them all day.  I'll keep trying them, but I switch back and forth to my regular nikes to give my feet a break.  I don't notice a big difference in "the burn" when wearing them either, but I may be too distracted by my feet hurting!  I bought my usual size too.  I don't think I would spend the extra money again for this style.