I ordered 1/2 size up (11) after reading reviews.  Good call, they fit perfectly, with about a thumb width from the tip of my big toe.  If you are looking for a spongy shoe, this is not it.  If you are looking for a shoe that has great support, arch and otherwise, and a more orthotic feel, this is it.  Nice and light, but well built.  I adjusted the speed lace so they now can just be quickly slipped on and off, yet stay snug during a workout.