These shoes are a perfect fit and are very comfortable. They're very lightweight and very breathable - not at all like a typical "sturdy" running shoe.  I've run in them maybe a dozen times since I got them (1-2.5 miles at a time at 7.5mph) and I've never felt soreness afterwards.  For my first experience in "near-barefoot" running I'd say these shoes make it easy.  I'm a forefoot striker and have a medium-high arch.  The jury's still out on whether I underpronate or not...I've never had my foot assessed in a pro stores (too afraid of being coerced into buying a high-priced sneaker I can't afford LOL!)  I would definitely buy these shoes again.