Some are more comfortable than others. Wide is easier than thin, rounded toe more comfortable than pointed, platforms give a smaller angle than they appear. The fit is very important, go up a size if necessary. You need to make sure you have room in the toes because your foot will slide down a little. The right shoe will allow that without going to far or rubbing blisters. And padding is a must. A lot of cheap heels don't have any at all, and that's almost as bad as walking barefoot in the street.