These really work!  I used them on several pairs of shoes.  I have a rather wide foot and after using the stretchers I have made my uncomfortable shoes comfortable to wear.  I like the little knob inserts you can use to get the stretch you need in just the right place.  I would first stretch for 24 hrs. and then check on the fit.  I kept doing that until it felt good.  Wish I would have gotten one of these sooner!