Holding power lasted about 4 months.  I tried cleaning and it restored minimal stickiness.  Now I have little carpets hanging over the edge, on the wrong stairs,  placed vertically, etc.  Trying to hold the hubby at bay who wants to rip these things up (Still pretty sticky on the back but leave white goo when you try to peel) and is dying to tack or nail them into some very nice oak treads.