I use this X on my 33ft trailer. I'm more comfortable padding wheels with it when one side of my van is a few inches off the bottom of the Lynx levelers. The product itself appears to be well put together. I'm not afraid to toss them on the floor when setting them up or toss them in my storage compartments. It only takes a few minutes to snap into place with the included ratchet, and that's it! I believe it also helped stabilize the camper itself by eliminating some wheel hop. I was so impressed with them that I bought my father a pair for his caravan. I have and will recommend it to others!