I took my truck out with 3k trailer tonight to pick up some lumber (boat trailer) that was too long for my truck. I had it on haul mode, I have to say that this was a huge improvement over stock. I don't think there was any learning that I can feel right off. This doesn't flare anymore and just feels great, I'm really happy. We'll see tomorrow when I put 10K load behind it after driving with unloaded trailer for an hour or two. I plan on giving it a little time to figure things out with the heavy load. I was never happy with the way the truck hauled stock, now it's unbelievable.