In reply to Milesy:
Hi,
The Pontas is sized at a half size down from your street shoe for multi-pitch or all day comfort.
A full size down for more technical climbing and taking shoes off between climbs, eg single pitch sport climbs. There is a big difference in half a size in these shoes. If they are a bit tight in length they will stretch but a bit less than half a size and conform to your foot shape more so. Straight out of the box they seem too have more pressure points than the La Sportivas, with my feet.
La Sportivas Muiras and Katanas are sized between 2 to 3 sizes less.