I used this Pet Gear Ramp for my cat with a spinal issue and it made using the LR3 sooo much easier for him. Unfortunately ALL my cats liked it so much that they quit using the 2 LRs with no ramp, so I had to buy 2 more ramps, sigh. On a positive note, it is super high quality, VERY stable, and the washable mat catches a ton of litter. It also comes in a light gray but is out of stock at both Amazon and Chewy lately.