No issues. I pass the upper straps through the hinges of the tailgate, bit fiddley but strongest part of the back end. With pulled tight enough, the contact with rear window & rear bumper is lessened, and act as stabilisation rather than taking so much weight. Used only a few times to date, but no problems at all, and no signs of deformation of any parts. I only carry the one bike, which is quite lightweight. (Only one in the family that cycles outside home teritory!)