My concern when I got them was if there was going to be enough room at the toes or that my big toe would be hitting the end.
The more I wore them, however, the overall shoe seemed to break in and make room. I got my true size btw.
To each their own but I just think in the long run it'd be a mistake to get a bigger size in these, given the fact that they do break in. You'd think these would have to fit true to size since the molds would have to be made to accommodate each specific foot size. Given the properties of this shoe, I don't think Nike would flake on making the sizing correct.
I can understand going up .5 size if your toes are hitting the end but definitely don't go up just because the shoes fit tight around the sides of your foot when you're first starting out with them. That tightness goes away after approximately 5-7 times wearing the shoe.
Aside from getting used to how these shoes fit, Foam Ones are easily one of the top 2 or 3 shoes I've ever worn. Most of the stuff coming out today can't even compare to them.
PHOENIX SUNS
MV3 - The Matrix - S.T.A.T. - The Brazilian Blur - G. Hill