The women's muira's are the best shoe for slab and face climbs. The rubber is super sticky, the heel is super grippy on heel-hooks, and the arch is nice and high. The padding in the heel makes a huge difference in the fit of the shoe. I have several guy friends that wear the women's shoe because the fit is so good. The aggressive downturn of the shoe also is really nice and the big toe box means you can size down quite a bit. I wear a 8 1/5 street size and I think my 37 Muira's are comfy and maybe a half size too big.
That said, these are not my fav shoes for crack climbing especially in places where the sharp rock eats up the rubber.