Love, love, love these rugs! We have two dachshunds who run like crazy on our hardwood floors, chasing each other, and they need traction. These rugs fit the bill. The rugs are heavy enough that they slip less than others while providing protection for those long backs.
My only complaint is that the manufacturer FOLDS them for shipping, which leaves marks in the rugs. It takes a few days for the marks to flatten out; they should be ROLLED for shipping, with the top side down. If they were sent that way, the rugs would lay flat from the get-go and it would reduce any trip hazard.