To clarify: AeroPACK mounts on all hatch backs or lift gates and is made in USA. It does mount on a Prius with a short spoiler.
Roof mounting gear with a box, basket or racks creates a 17% to 25% mpg loss (Consumer Reports test data) depending on car and speeds. Edmunds performed a similar test and reported a 21% mpg loss with roof mounted gear.
AeroPACK when loaded, reduces eddy currents behind the vehicle. Some customers have reported mpg improvements, we make no guarantee.
It is much easier to load than climbing on the roof. Contact me at
support@aeropackusa.com There are lots of happy AeroPACK owners.
Cheers....