The reviews here are accurate, they do slip in the heel but I wouldn't buy a size smaller as they'll be too short. The suggestion to customer suggestion to forcibly bend the sole of the shoe really helps the slipping in the heel. I have a high instep so they do press against on the top of my foot and I'm trying to decide if I should return them or if they'll stretch. This wouldn't be  a problem for a regular foot. I love the heel height and they are very cute.