This product makes stretching my tight shoes a breeze.  I wish I had known about this product before now.  I've suffered through hundred of blisters through the years just to make a tight pair of heels fit me.  I sprayed this product onto a cotton round and rubbed the solution onto the inside of the shoe, put on a pair of socks and walked around in the shoes for a couple of minutes.  Now I can comfortably wear the shoes without any rubbing.  One word of caution: don't let the spray touch the outside of the leather.  I noticed that it definitely is a bit corrosive and took the shine off the leather in a couple of small places.