jared M.wrote a review of Yakima Sprocket Rocket on May 1, 2016
Familiarity: I've put it through the wringer
I haven't owned many roof top bike racks so I cannot offer comparison, but I can say that this one is fantastic. It is exceptionally solid with everything from my super light road bikes, to 29er mountain bikes, and even heavy beach cruisers.
It is easy to install, easy to get bikes on and off, and it doesn't look as sloppy as some of the other options out there. It is, however; rather expensive, so all this greatness will cost. Highly recommend picking one up if you come across it on sale.