Just had my first run on these shoes after they arrived yesterday. The shoes were very light, almost like wearing slippers (without the weigh down feel). Also, just as important is that the toe box was roomy and comfortable. My other running shoes were US size 10. But for this one, I got US 10.5. And I'm glad I did. The slightly extra room meant that my longest toe would not crash against the internal wall of the shoe during long distance runs when the feet tend to expand especially during hot and humid weather. Another point to note is that the orange fabric felt very comfy to the toes as compared to the other shoes that I own. Lastly, the only thing that I probably need to get used to is the flat sole. It felt thinner than my Asics Tarther Blitz (7-oz). Then again, the reduced weight and greater comfort the Mizuno Wave Universe provides kinda makes it the shoe for me on race day.