Love these! Our stairs were super slippery for our puppy and these slowed him down. My husband had also slipped several times in his socks, so he loves them too. We tried them without any carpet tape, but they did slide around a tiny bit. Eventually they were all askew, so I applied carpet tape in the end. I only wish I had the option to buy individual treads because I have one more step that could use a tread to complete the look. Fortunately, that's the bottom step so there isn't far to fall if anyone slips! ;)