Honestly, I am so happy I purchased these.  They go everywhere with ease and blend with all of my casual pants.  They have a slight heel which helps them be even more comfortable for me.  After receiving them I wore them every day until it got too hot out.  The gray color is a nice mix of gray and brown.  I wear size 8 and the 39 European size is about a half size too big, so I occasionally do trip a bit.  Otherwise, they fit tight with the adjustable strap and stay on.  I think the 7 1/2 or 38 European size would have been too small.