Hey bought a pair of "go runs" about a month ago, liked them so much I bought another pair. My chronic achilles injury cleared up within about 3 weeks (achilles issues for years)and a huge knot on the back of my left heal where the achilles inserts is pretty much now gone. Quite impressive in my opinion. Its nice to be limited by cardiovascular conditioning as opposed to connective tissue issues for a change. Biomechanically, the way the shoe is designed it forces you to become a forefoot runner, which is desirable. Most other shoes tend to promote a first heal strike. Bought my wife a pair also.