I typically wear Saucony Kinvaras.  For some reason, this particular shoe caused my left big toe to swell at the end of the race (a half marathon).  I suspect a slight difference in the shoe design from my other Saucony Kinvara 5 Viziglo caused the problem.  The seams by the laces are not sewn down like the Kinvara 5 Viziglo, and the rub of the seams caused irritation to the top of my foot (my big toe in particular).  I would be weary to wear these shoes for any event longer than an hour of running.