Been using on for over 2 years now with our Jayco Hummingbird (3,750 lbs / 480 lb TW). Can't speak for weight transfer now that we're pulling with a 2500 Duramax, but it seemed to transfer weight well back when we were pulling with our old FJ Crusier. Mostly use it now for sway control.
I recently updated to the new hitch plate system and like it even more now. It's been solid for us, wouldn't think about using anything different for our application.
And their customer service as been spot on, I even had them build a custom extended shank for our new truck so I can fully open the tailgate while hooked up.
