I took off one star because they do run a little bit small.  Mine are too tight, but as I wear them for 1 hour at the gym it was not worth sending them back.  I am ALWAYS an 8.5, I have never had an issue with a show not fitting before.  Maybe not fitting the shape of my foot, not being comfortable, but they always fit size-wise. My toes are just right to the end of these.  For someone with a large instep, these may be a bit too tight in that area as well.  I don't have that issue and it is snug across mine..
Otherwise, I love the lightweight feel and especially love the look of them.
I had them in my cart for almost a year before the price came down and I finally pulled the trigger and purchased them.