Air Safe Receiver Hitch for trailer - any reports?

[denning]

I'm thinking of buying an "Air Safe" class 6 receiver hitch to fit to the towbar of my bus.

Vehicle is a 40 ft Denning (Australian) weight aprox 35,000 pounds. My car carying trailer which is a double decker with my boat on top weighs aprox 7,700 pounds fully loaded.

The manufacturers recomend this model for "Motor Coaches" as they have shockers on them to help reduce oscillation caused by the much greater weight of the bus compared to the trailer.

Has anyone got one of these? How do they handle?