I am willing to bet...
I'm more of a sure-thing kinda guy. And, I'm sure that the Versa-Hauler on my Suburban works.
I'm also sure that switching to LT-series tires for all my towing/hauling needs was the right thing to do for vehicle stability.
In 10,000 + loaded miles, the Versa-Haul has performed its function quite well. It was well worth the $350 +/- I spent on it back in 2003.