Bike Hangers

Folks,

I already have a 3 bike Thule Euro Ride Bike Rack, this covers my needs most of the time. We are going to France in 10 days or so ... and I need to bring all 4 bikes this time, so I need a 4 bike carrier. I really am reluctant to shell out again for a similar Thule 4 bike carrier.

What folks make of these tow bar mounted bike hangers? I was thinking about a "Buzz Rack Buffalo 4". Will the French police have a problem with one of these hanging off our Kia Sportage? Do they damage the Bikes?

Ray K