bought these thinking they would be comfortable.. omg, it's like walking around in tennis shoes.  i have an extremely narrow foot, but the strap holds my foot down comfortably.  other reviewers alerted me to the fact that they run big, so keep that in mind -- i suggest a half-size down.  i got the red ones, and already 3 of my friends bought them, too.  i made them put them on to see how incredibly comfy they are.  so perfect for the ladies who love heels, but hate the way they feel!  HIGHLY recommend.