in my own opinion i think these shoes suck. although they do help with your running form,.but you can do that yourself without these shoes.
the reason i think they suck is, ive seen plenty of athltes running in these and run over a rock and thats it for them. there's not much padding for all terrain running. outside. glass. nails. rocks.
also if you are not running on the balls of your feet with a slight lean forward, then you are running the wrong way. running heel to toe with give you shin splints.
http://www.runningplanet.com/training/toe-ball-heel-foot-strike.html