I've lost track of exactly how many of these Green Silence shoes we've bought for my husband over the past several years (beginning, of course, with the bright red/yellow ones that looked like Ronald McDonald shoes).  These shoes have quickly become his favorites; and we now generally order 2-3 pairs at a time.  He finds the shoes to be one step above a minimalist running shoe...comfortable, breathable, and extremely lightweight, and yet well-cushioned.  He wears them for both training and races (marathons, halfs, and 10Ks).  The lifespan of the shoe is pretty good also; he usually gets 300-400 miles out of each pair.