They technically are okay
So, they do work as they are supposed to and fill my shoe in the back for a better fit. However, they are one hell of a thing to stick on. When trying to get the back cover off the it started coming apart. I noticed right away and stopped otherwise I would have ruined them and ripped of the actual sticky layer. The layers wanted to separate so easily. One I succeeded in that I got them in my boots and when I tried to put my feet in the adhesion came off and it stuck to me instead. I used a shoe horn to hold it down but otherwise it would have just attached to my foot instead. They worked once I got my foot in and I don't know how long they will stay. They are what they say but their usability is terrible.
Rating: 2 stars