I ordered the ramp for my 14 year old Porti-Lord, and I am convinced of the ramp. My Woof was initially not so enthusiastic and preferred the usual jump in the car, which no longer is attached to the vet for his age. I believe this is due to the getting used to the rough surface of the tread. After a few days of training, he has but the ramp well received and wobbles now blissfully up and down.
The use of the ramp is easy, even if the part is quite bulky and platzeinnehmend in the car. Tucked behind the passenger seat you go but good.
Conclusion: I would 'buy back, at Woof I'm not so sure .....