jki5610854wrote a review of Diadora Vortex Racer II Shoes - Men's on December 20, 2017
Familiarity: I've used it several times
I wear size US 8.5 and ordered a size 42 and they fit perfect. I used it for a local race and found them to be quite comfortable. I’ve used them together with my Time Expresso 4 without much issues. Another reviewer here stated the boa mechanism dug into his feet. I was able to tighten them snug without the above issues.
I bought these shoes for several reasons: BOA technology without the high price, stiffness, color matches my Giant TCR Advanced 2 Disc paint, and the unique Diadora style that sets it apart from the sea of ugly SIDI, Fizik, Giro shoes in the peleton.