Hi Bullant,
Just changed over from Hyland Ball to the McHitch Auto-coupler on my Johnno's Walk-up camper about 2 months ago and just completed approx. 9500km of Savanah Way, Cape York, Old Telegraph Track to the tip and return to Katherine. Fantastic hitch, no issues at all. (Only thing I did was bend the bottom of the handbrake lever as I left a little too much below the drawbar (should have shortened it before I left....) somewhere on the OTT (likely Cockatoo Creek from memory)
During the install though, I did have to weld and redrill the holes on the camper draw bar as the Hyland bolt pattern was smaller than the now standard hitch pattern.
Towed very well behind our Landcruiser 105 series.
Cheers
John