I bought these for work because I'm on my feet all day and I was let down.  I realize that this design of shoe is supposed to slip up and down in the heel, but it was quite severe.  It felt like I was wearing flip-flops, but my heel would get caught on the back of the shoe on the way back down and I would have to reposition it every step I took.

I am normally a size 8, so that is the size that I ordered.  It is possible that they were just too large and a size 7 wouldn't have been so floppy, but I am just going to return them.  If I saw these at a store I would definitely try on a size 7 and buy them if they weren't floppy.  The sole of the shoe *did* feel comfortable.  If you want to get these shoes I would recommend trying them on somewhere first, or ordering in a couple sizes and returning the one that doesn't fit.