I've purchased 5 pairs of this shoe in the last few years, and I keep coming back to it. I have flat feet and for long hikes in the urban concrete jungle, nothing keeps my feet happy like these shoes.  I can walk for hours without knee or back pain, and the only other shoes in my closet that's true for are actual hiking boots.

I take the worn out pair and keep it for beach walks and muddy walks with the dog.  So I usually have at least two pairs of these hanging around the house.  Seriously, they're a great investment.