We're using this ramp for a very senior, arthritic Yorkie (18 yo) to help her navigate our 4\" patio platform step. So far, it seems to be doing the job for her. One major FYI - Since the ramp is made of a heavy rubber, it gets VERY hot when exposed to the noonday sun. So if you plan to use it for a pet-assist, be sure to mitigate the heat by placing a rug or other protective cover on the rubber surface. If you use it as typically intended - for a wheelchair ramp, the heat is, of course, a non-issue. Also note, as indicated in some of the reviews, this ramp is very heavy - almost 60 lbs. The image of it's being casually carried under the male model's arm, is very deceptive, unless you're Superman.