The set is considerably cheaper than a purchase of the items. It fits well on our roof rails (Ford Kuga BJ 2013) and the rubber lips while protecting the Alureling.
A star deduction there is that it's not really locked in my opinion. With a "Spezialwerkkzeug" the carrier is tightened on the railing. But this is merely a very long star-shaped Allen key ... Here me the classical system with a key would prefer.