Had these shoes since christmas. They took awhile to break in, but are incredibly solid shoes. I wear a 9.5 / 10 in a street shoe. Went with a 39.0 in these, and they are reaaaally tight, but after around 10 bouldering sessions they came around and don't hurt anymore. I think next time I would definitely size up to 40.0, but maybe i'm just a wuss.