Steve Brain wrote a review of Thule Box/Storage Lift on August 21, 2014
Familiarity: I've put it through the wringer
Took about 2 hours to install and hoisted my box off the roof of my car, and stored really snug to the garage roof. Love that I can hoist directly off the roof.
Mounting hardware included only suitable for fixing to a solid roof. You need to provide your own fixings for any other mounting.