Haven't used it yet, probably no time soon. (Forecast is -18, 8"-12"snow and 30 mph wind)
Towed it about 150 miles total so far. It is heavy. took my setup (dry) to the local grain elevator and ran across scales 24,660 lbs. Truck pulled it ok. My miles have been all flat though. Put airbags on truck prior to pick up. I recommend Firestone airbags to anybody pulling a fifth wheel.
Just did some mods to truck which increased torque, now I am slipping my clutch.
Putting in new double disc next week, then I should be ready for the Smoky Mountains this summer