I already own two pairs of Birkenstocks because of my extremely high arches - orthotic guy told me these were the best since you can't really wear orthotics with cute sandals. And while I love my Birks, I needed a strap on the back because I couldn't really walk properly. So I tried these. They are so incredibly comfortable when you put them on! The shiny patent leather strap is a bit unnerving, but then it looks really cute! The strap does not rub on my ankle at all, and even though the front pushes into the top of my foot (my shin? ankle?) it doesn't hurt at all. No rubbing. And I do not care for flip flops because I hate the strap between the two toes, but I don't mind these at all! They are cute, they fit the size perfectly (I wear 39 and I ordered 39) and they were a great price! I think I'll buy a few more colours!