I bought these shoes after reading lots of reviews about the way they fit. I order a 37.5 (I usually wear a 37). The first few weeks, they were torture to wear. Any time I wasn't on the rock, the shoes were off. Sometimes they'd pinch so bad I'd take them off as soon as i got to the top of a route.
Fast forward 3 weeks, and these are the best shoes I have ever owned. Aside from the occasional toe pinch, they stretch just enough to make them bearable but not enough to lose the naturally aggressive fit. This makes thses shoes perfect for both toeing in and heels hooks. I love using micro edges for feet and these make it feel like you're standing on a ledge. On granite its almost like you don't even need a foot because the rubber sticks like crazy.
I've had them for about 8 months now and have thoroughly put them to the test. I've worn down the rubber on the toes to the point that they are now my gym shoes. Although I am seriously contemplating just having them resoled, or simply buying the same pair again. I've tried a lot of other shoes on and tested them at the gym, but nothing fits and grips quite like these do.