Terrible.These treads came with double sided tape that stuck very well to my stairs and not at all to the carpet. The very first day they were coming off and I had swept and cleaned the steps. It was not an installation issue. They then became a slip hazard which is what I was trying to prevent by adding them! They also were not quite square at the corners and had char marks on many of the corners where they were obviously trying to prevent fraying and yet several corners were starting to fray already! The color was also inconsistent. Very disappointing and a huge pain to clean the sticky stringy tape/glue off my steps and then have to return the treads. Don't bother with these!