Finally got to try on a pair of Trainers...definitely pretty narrow, especially coming from a Vomero(!). Didn't even bother trying on the Racers...those were ridiculously light, pretty much mesh and a sole...and VERY COOL LOOKING. I use to wear size 10 Nikes back in the day, then 9.5, and with the Trainers I was definitely a 9, the heel was slipping in the 9.5s and I had some room in the toe but the 9s fit great in the heel. Cushioning was better than expected (but then my Vomero 4s are ancient and worn down), but like I said before, it was very narrow in the front, but not uncomfortably so, I'm sure I could get use to it...kinda feels like I was on rollerblades or ice skates!
Anyway, I might wait for different colorways or different type of a sole. I really like the idea of flyknit, but I'm not quite sure it's for me yet...we'll see...
BTW: THe Chicago Fleet Feet on Wells got a new batch of Trainers in (the Volt and the Orange) and I think they have some Racers left too...