I haven't used these treads yet as I want to paint my steps.  I like the color and look of these treads, especially if I place them on dark gray steps.  They seem flimsy though and I don't know if they will stay on the steps without carpet tape (none was suggested nor was any included), but again I haven't put them down yet.  There are 15 treads, which is a good number.  I plan on using 2 of the treads together on a landing to continue the look.  I will review these again after I actually use them.