For a Birkenstock slide in sandal the rating is a one.  It may be 5 in all other aspects than the one I will focus on ( or normal for a birkenstock sandal of this slide in design.)
  I sent them back right away.  The problem is that the upper is constructed out of floppy soft suede and the material is so floppy the wearer is probably going to have to reach down every time he puts them on,  rather than quickly slipping in the feet and going.  I never got to try the softbed feature and evaluate it, which is what I was really interested in.  I took a careful look at the other colors hoping to find a stiff material-- but could not.  The amazaon birkenstock offerings for softbed sandals takes you to some color choices that do not say softbed, and some that do.  Apparently the softbed come only with the floppy uppers that makes them virtually dysfunctional as slide in slide out sandals.
  The  truth is that Earth makes far and away the best men's sandals of this nature.  Earth must have been taken over by fairies who only make woman's shoes.  Hopefully Earth will come out with some men's sandals of their traditional slide in style sometime soon.  After all, Earth is a German Company, and the culture of macho among the German Elite is endangered at Earth if they let the fairies run the show.