I read most of the reviews for these shoes, and as soon as my shoes arrived I started wearing them about the house to check for any of the complaints that some people wrote of.  The shoes were absolutely comfortable.  I realized that wearing new shoes only around the house may not reveal problems that the shoe may have, so I wore them the next day, out and about all day and at work.  No point of discomfort whatsoever.  Nothing pinching or squeezing and the heals don't slide up and down when I walk.  I wear a size 9, I ordered a size 9 and it fits perfectly with room for my toes to wriggle.  They're quiet when I walk, which is what I like and they're skid-proof.  My town insists on using those stupid yellow metal plates on sidewalk corners and for some reason they didn't copy the good design from the military, and so those plates are very slippery when wet.  It was raining the second day I wore my Crocks and they gripped the surface of those plates.  No skidding.

7/22/2012 UPDATE: The treads don't last long. They wear down very quickly.