re: How long should tennis shoes last

I've got a few pairs of Nano's and the inside of the heel is busted in all of them. If I don't pay attention they will cause a blister. Nothing else is wrong. Barely worn, nothing else busted. I bought a air that has elements of the nano x2 and another shoe for $65, half the price on my Nano x3's and no issues, or inside heel problems.