I don't think this is news to anyone who has done any running in the past few years.  I'm not a fan at all.  I'm 99.9% certain transitioning into these is what caused a stress fracture in my right foot, and I'm also just as certain my running form isn't all that much in need of adjustments.  I'm just glad someone was willing to buy them used from me on ebay.  Buyer and user beware.  After all their acceptance to date and somewhat cult like following, I'm thinking I'm with the majority of folks who've maybe been there done that and won't go back, or say to themselves why bother.  One things for sure, they are not the shoe of choice for any race I've been at, and I've never seen anyone I admire for their running performance wearing them.  This is where you tell me "the great abc" is using them, to which I say as always, to each his own.  They cost me four months of my running life, and I don't like them, and surely didn't like running in them.