I bought these shoes as a last ditch effort for my half-marathon training.  All my other shoes made my toes turn black and my feet ached.  I bought these a 1/2 size bigger than what I would normally use and it is pure comfort.  My feet haven't ached when I go for a long run or during training.  I've even wore them to a training class because they're so comfortable.  I know they're expensive and I hemmed and hawed over the cost but they're worth it.  Definately recommend.