Simple installation. The reviewers that spoke of it scratching their vehicle must not have tightened all 6 straps or set it up per the instructions. I had it up and going within 10 minutes and the was loaded with 4 mountain bikes. I read another review talking about different sized bicycles, and I could see where that would be an issue as the bikes do need to kind of "mesh" with one another. I had 3 24" adult size and a 22" for my younger pre-teen.