I ordered these to replace a pair of A5020Ws, as Amazon didn't have my size in that model at the moment. The A5018Ws are practically identical to the A5020W. Comfort right out of the box. AVIAs are the first sport shoe that I have *ever* been able to wear right out of the box, without having to buy expensive insoles just to make them tolerable. I have flat feet and a low-profile foot. These shoes are light-weight, hug the foot comfortably, support in all the right places, and the Cantilever feature is a must-have. I can walk all day in them, and I have. Love my AVIAs!