I use it quite a bit and not just for towing. The F53 V10 tow feature acts as an engine brake as well as better torque for pulling loads and grades. When going down descents, press the button and when you hit the brakes, the transmission will drop to a lower gear, hit it again and will drop further etc. I have gone down 6% grades using it and never had to actually use my brakes to slow me down. I also use it in traffic as the lower gear helps slow you down, again using the engine to brake more than the brakes. The button simply changes the shifting for better pulling and braking. I wouldn’t use it on the highway.