Sizing..
I just recieved my Achilles heel in my true size . And I must say, compared to the IX, there is probably a tiny bit more room between the big toe to the end of the shoe (Barely..2-3mm's). The thumbnail rule does still apply, which is good. The width is narrow & snug and my foot doesn't slide around at all. I know if I were to .5 size down it would be a more 'snug' fit but it definitely would sacrifice wear time as it would definitely cause irritation to your toes overtime from rubbing. Because remember guys, the stuff they use in flyknit basketball shoes make the upper stiff and less stretchy compared to a runner or the fly weave used in the Jordan xx9-xxx. It seems even with break-in, this upper won't give that much to a point where it would change the fitment to a lesser degree. Overall, I say stay TRUE!