Wonderful idea although the dog wasn't too keen on it at first. I did as the instruction leaflet suggests and laid it flat for him to get used to it, then propped it on the sofa (I don't have a car but a friend takes me to and from the vet when needed). He took some coaxing but after about 10 minutes he did walk up most of it. I am pushed for space in my flat so there weren't many options for testing it. He wasn't so clever at coming down it, tending to jump off half way down when fully extended. He is a bearded collie, and a bright dog, dog training was a doddle. As he's having an operation and mustn't jump on and off things I thought the ramp would help - there is no way I can lift his 30kg from car to ground and vice versa. Hopefully he'll still be dopey from anaesthetic and easy to persuade to go up and down the ramp just to get home. The so called safety strap which does its job well is a plastic piece, not very long, attached to the body of the ramp with a screw and washer. Its a bit of a palaver to have to screw and unscrew each time the ramp is transported/carried, I think the design could have been improved. But it is a good ramp, no hint of unsteadiness (which would have freaked out my boy) and it has non-slip surface to walk on. My dog was happier when I covered that with a folded up throw. If you have done agility training with your dog its no worse than an "A" frame and not so steep. Good value for money I think. Update: I put ordinary door mats on the ramp instead of the throw, and he walked up it and down it like he'd been doing it all his life. He's not keen on the nonslip surface though. Best thing about this ramp is it is so lightweight to carry. A really good investment. Downside: it has a peculiar smell which I presume comes from the non-slip surface. Hopefully that will wear off in time. This has been a great ramp to use in conjunction with the grooming table, and the more we've used it the better the dog has been at going up and coming down.A very sturdy piece of kit that easily bears my slightly overweight, elderly Lab, Prince. It took a few tries and half a box of treats, for him to get the gist of it, and he seems quite happy with it now. The ramp slides apart easily, so best to mind your fingers and toes when you undo the small retaining strap and a good idea to always use the strap to secure it all before you try picking it up. It fits nicely in the rear seat footwell of my car, but I do place a cover over it to stop any muck/water dripping on the floor or seats. Somebody pointed out that the walking surface is fairly rough and can scratch the inside of the car, but having a cover (old blanket) over it stops that. The surface is rough, but it has very good grip, sands down the dogs claws without damage to his pads and is useful for striking matches for our camping stove. All in all, quite expensive but seems a good quality build and I feel confident that the Prince is safe, and he's happy that he can go for a ride. I'm very happy with it. p.s. Prince says "Thanks".The length of the ramp easily adjusts to the length you need compared with one that folds. I've room in my vehicle to store it when it's not in use so don't have the problems some other buyers had.The surface of the ramp is a rough sandpaper sort of texture which may feel suitable when you put your hand on it but has far too little grip for a dog. I found it wouldn't stay hooked over the bumper and slid off when my dog attempted to use it. Instead I had to open the door of the dog car cage and hook it over the bottom lip of that, which then meant that I couldn't close the cage door until the ramp was removed. Far from ideal.I bought this ramp for my elderly Labrador. He really struggles to walk up it not from his age but due to not being able to grip the surface well enough. It doesn’t rock side to side as he scrambles up it nor does it slide backwards even though there is no hook to go over the boot lip. So it is relatively study. It also slides out easily and has a fastening to stop it sliding out.The other issue I have with it is the size. Once my dog is in the boot of my Ford Focus I then struggle to put the ramp in behind him. It takes up quite a bit of space in the boot too.