I have flat feet and some arthritis in my heels.  I have this shoe and also its mid-height cousin, and though I've needed to add orthotics to each, they are a shoe in which I can walk about as far as I could ever walk, in complete comfort.  I wear one or the other of these shoes most of the time when I'm not wearing dress shoes, like right now as I write this.  Like all other Merrel products with which I am familiar, they do run a half to a whole size small.  I wear a nine in a dress shoe, but with a heavier sock thrown in, a ten fits me perfectly in this particular Merrel.