I did the precision fit guide online at the mizuno website and got these. some people have complained about not having enough room for this toes, but i have plenty of room. in fact, during my run yesterday, i could actually move my toes around and even curl them under a bit. maybe i just have small toes. my previous pair of running shoes are nike+ and i will miss being able to use the ipod adapter in the bottom of the shoe. i love the colors offered, this one in white/ ceramic ink blue looks whiter in person than in the photos. it comes out a little grayish in some of the photos online.
also you can't beat the amazon price for these!