These stairs are perfect for my big (seventeen pound) kitty who's getting on in years, but won't admit it.  I've noticed he's been having some trouble getting up onto my glass-topped coffee table, probably because it doesn't have a cloth surface he can sink his claws into, so I thought I'd try this.  He was a little hesitant at first, and I thought the steps might be too small or too close together for him, but after one time of me lifting him up onto the steps and guiding him up them he took to it like a cat to cream.  Now he trots up them without a break in stride.  I'm going to try it in front of the couch next, to see if he'll use it instead of using his claws to boost himself up.  It's worth a shot!  If he does, I'll be buying LOTS  of these things.