I bought this for my 11-year-old large (80 lb) Lab mix who could no longer jump into my Outback. I also wanted it to aid his transition from ground to vehicle following back surgery (him, not me). He is too heavy for me to lift and after several days of gradual habituation, he had no qualms about using it. The surface is no-slick sand-paper-like and he never lost his footing, which would have frightened him. It was wide enough to make him and me comfortable regarding footing, especially since his hindquarters were losing coordination due to the back problem.I began by placing the ramp folded into the smaller length flat on a floor in a narrow hallway where he would have to walk over it to get to where he wanted to go. After two days, I opened it to the second section; after three days I opened it all the way.Next, I placed the double length on the first step of my stairway to the upstairs where we all sleep. I blocked the sides so he would have to walk up the ramp to the second step. After two nights I opened it all the way and placed it on the second step. The next two nights I placed it on the third step. I never "trained" him to use it; only made it a routine part of access to areas he wanted to get to. I never made a big deal of his using it and I walked on it to so he could follow.The next day I introduced the ramp into the vehicle and with stinky cheese, urged him to walk all the way into the cargo area of the car. He did so without a blink. I took him to one of our favorite places--a lake with a natural path for a walk. This way he associated the ramp with a new freedom to be able to get into the car again and go someplace fun.By the time I had to load him for his trip to the hospital for back surgery, he knew the ramp meant he could go with me anywhere. By "loading" the association of the ramp with pleasant experiences before the hospital trip, he did not separate the experience and associate the ramp with the vet office. Mission accomplished!Great product; wide, non-slip, sturdy, did not wobble or creak, never slid off the bumper (a sure way to instill fear in a dog). Easy to fold up, not too heavy, easy to store. Solid sections when folded all the way out--no bounce. Bought sight unseen but I am very impressed! Good value price-wise too.