I'm a heavy guy and wear shoes out internally (cushioning) way before they actually "look" bad on the outside.  I like comfort, so I'm buying shoes more frequently than most.  I don't mind spending more if I get more.  For the price of these shoes, I think they're an awesome value because the support and comfort are absolutely top-notch and the soles are good on most surfaces - important in the winter time if you like to stay vertical.  Keen's larger toe box area keeps your toes comfortable - no pressure on the sides of your toes.  This is my second pair of Keens and as long as they keep building shoes like this, I'll keep buying them instead of others!