This rack worked great as a cost effective measure to carry a 3rd bike on my roof. One of the other riders had an old Thule roof rack that would not fit the factory racks of his new car nor mine. He's planning on getting these adapters also. Now that I have them, I plan to get a newer model roof rack. This is better than having to totally replace my factory racks in addtion to the cost of the roof rack. I normally do not need access to carry a third bike.
My only wish is that Thule would make all their items universal to factory racks.
Bottom line: This is a great purchase if you already have a Thule product that does not fit factory racks.