I found these to run smaller than the same size in Cayman or Beach styles. I wear 9w/7m in Cayman and Beach styles, so I ordered the same for the Bistro. I should've ordered the next size up. The back sits higher on the heel/foot (even with the strap moved to the front) and I find that it is too tight. Not too tight to be painful, but it is uncomfortable.
Also didn't realize how much my feet would sweat in these. This is my first pair of totally enclosed Crocs (no holes). I ordered them specifically so I could wear them in wet/winter weather. My feet come out of these and my socks are SOAKED with sweat. I guess I took the holes for granted.
I like the tread on these- they seem to hold up better than my Beach or Cayman (although I'm not wearing these as often because of the fit). The tread is a harder rubber on the bottom/more traction- but it also tracks in dirt from outside very easily.