I bought my shape ups elsewhere, but I wanted to share.  When I first put these on, I noticed how tight the toe box is.  I have narrow feet and it still felt tight. However the shoes stretched out in time and the fit was very comfortable. There is a brief learning curve getting use to walking without tripping.  Once you learn how to walk in them, they are so comfortable and they feel so cushiony.  I loved the bouncy feeling they gave me.  I realized with a surprise how slip resistant they were! I was walking on a freshly mopped floor and the soles gripped solidly with each step.
Unfortunately, after a few months of wearing them, I developed tailor bunions below my little toe on both feet and had to stop wearing them. I currently have two small painful red bumps!  If I wear my shape ups again, I will need to wear a bunion cushion. I'm so bummed, because I really liked these shoes but need to heal and soothe down my bunions. I haven't tried any other shape ups and I'm wondering if the tightness in the toe box is standard.