Obviously this includes the usual caveats regarding 5.10 build quality, but my velcros are half a size smaller than my pinks. I remember that they were v tight to start with, and took a good while to break in but now they're ace.
Think the best advice is to try as many pairs at your size as possible - there can be quite a bit of variance between one size 6 shoe and one in another box. IIRC, I've actually got a left shoe from one box and a right shoe from a different one.
