I have and it works but does take some getting used to. The knob actually controls the angle between the truck and trailer and if you twist it around a lot the steering wheel goes crazy. With a little practice you learn what to do and get much smoother. It does take some setting up and a few secound to fire up the system when you turn it on. I feel like it is more useful on short trailers or narrow ones that you can't see well. I never use it on my equipment trailer that is 28' long and 102" wide. Not that it doesn't work, I just don't need it on that trailer.