*nods* I haven't found the rubber on mine very durable, but that may be due to my tendency to drag my left toe rather than anything else.

But they are lovely shoes, especially for tiny edges; I can stand on things I just can't with my other (also lovely) shoes.

ETA: Sportiva's website tells me that the Miura lace-ups have different rubber from the velcros, but I don't know how much difference that makes.