These did exactly what they are supposed to and that is help your pet get on and off of higher furniture safely.  I got these when my cat was 15 and very arthritic, but could no longer jump up on the bed.  She took to them right away and I used them for 3 years.  I am only giving these 3 stars though, because I found bugs hiding int he nooks and crannies every time I took them apart.  It really grossed me out.  Even after scrubbing them with bleach, I would take them apart 6 months later and I would find a bug or bugs again.  After several times they had to go.  On the plus side, the carpet on the steps comes off for easy cleaning and they come apart to store easily.  The 3 step model is very large and bulky so it took up a lot of real estate in my not very large bedroom.