I just got to tow our camper for the first time. 24' TT, 6k gvwr, say 800 in the truck including us, dog, firewood, gear. I am very pleased with towing performance. Acceleration is not an issue at all. On cruise w/tow mode, ran 75 up and down a few grades on I-70 in eastern Ohio. Truck would not have to drop to 2nd @4500 to maintain like the old 03, 6.0 hd did. It did drop to 70 and stayed at 3200 while climbing and that's OK I guess, the limit is 70 after all. Descent was controlled and no speed gain at all. Avg. 9.2 mpg on this trip, again better than the 8 or so from the 6.0. Integrated controller was effective, set at 4.5 and worked perfect. There is an engine/tranny braking effect when in tow if you tap the brakes to slow, the trans will downshift and noticeably reduce vehicle speed. Trailer light test mode is a handy option, between that and the b/u camera I don't need to bother the family while they do their tasks. All in all, a bad ass towing package for us, so much more pleasant.