I had hoped these would be as comfortable as the flat version, but they are not.  The straps were a bit tight across the top of my foot at first, so I could only wear them for about an hour each time.  They have started breaking in a bit now, so the straps are a bit looser and I can wear them longer but not all day.  The foot bed is not as cushy as the flat yoga mat version either.  But for the sale price, I kept them - if I had paid full price they would have gone back.