These are a great idea.  They are the perfect height to help our dog reach the top of our king size bed.  However, they slide on hardwood floors.  They come with little felt pads, but they are not effective.  Our dog is now afraid of these steps and won't use them.  They also flex a good bit when she's going up and down even though she is within the weight limit. We plan on taking these with us on vacation, so we will be working with her more and getting something to make the bottom not slide.