That thing? Ha, ha! I remember when that band-aid solution was released to the market TWENTY YEARS AGO. Before, your bike hung by the frame with little straps to hold it on tight. You kept an eye on your bikes in the rear view mirror the whole time, hoping a bump wouldn't dislodge them. Now with this "new" solution, you now have TWO MORE failure points ready to drop your bike on the freeway at 70 mph.
I haven't seen one of those things on the road in over a decade. Neato device though. I guess that makes the 99.99% of us out there "clueless."