Saris Bones is excellent (I have it) PROVIDED THAT THE TOP OF YOUR BUMPER IS NEARLY HORIZONTAL.
This is not the case for my 2014 Mustang GT (the bumper has the 'melted' look) and it requires a lot more tension in the straps which made me uncomfortable. I have a hitch mounted Thule now.
I still use the Saris Bones for my wife's BMW 328i.