I just “installed” the Range AFM disabler today, and it has made the truck definitely more pleasant to drive. Aside from my catback exhaust, I just like how the truck seems to hesitate and struggle with gears less without the v4 mode. I drove around in different scenarios, and I can see losing some mileage on the highway, but much of my driving is 40-50 with rolling hills and the AFM just annoyed me by constantly engaging -disengaging. I also noticed that I got fewer weird, hesitating down shifts when coming to a stop with AFM disabled. Truthfully this is a small sample size of miles based upon one day, but I love the truck even more as long as the Range device continues to work as it did today. I know the price is up there, but I like the idea of unplugging it when I need to go to the dealer. Just my two cents for now. I paid 189 with free shipping directly from Range in order to get the newest version. So far so good. I’ll update in a few weeks. Take care.