i have recently become a fan of clark's shoes, and bought these after being impressed by my pair of unstructured--also great.
this style, the wave, is so designed as to roll you forward as you walk--i don't know how else to describe it--so that, like a wave, your volition needs less effort. makes for a very smooth gait. extremely comfortable, almost like an orthopedic shoe, but stylish. if, as in my case, your profession keeps you on your feet all day, you'll be very happy with these. one comment, however: whereas i am usually size 6 1/2 M, i did better with these in a 6 W.