Got these for my wife a while back and soon after she made me buy her some more.  She loves to wear them with her Sperry topsiders (surprise) and also with Toms or other similar shoes whenever a lot of walking is on the agenda.  They fit right, they stay in place due to these little rubbery pads, and they have held up surprisingly well considering the somewhat insubstantial design (I mean, it just covers the lower part of your foot!).  Just what she wanted.