OK, so we got to tow with the truck this weekend. Worked GREAT.
I think the best wa yto describe it, is I didn't feel the trailer at all. I didn't have to brake harder than normal, and didn't feel like the trailer was pushing or dragging us. Very seamless operation with this brake controller.
Overall, the truck was easy to tow with. We were towing about a 5500-6000lb load, with 500lbs in the bed as well. Got about 11.5 mpg @ 70 mph.
I wasn't sure how it'd do without the manual shifters than the dodge and chevy have, but it towed fine in 6th, and then would go into 5th when I wanted it to, and stayed there as long as I wanted it, very easy to control what gear it stays in. Tow/Haul worked very well.