I use the Dually headcollar and it works very well. My horse is over 17hh and loves to charge off without me and I have found this the most effect method without resorting to Chifney/bridles etc. It works on the nose only.
I did try the rope type halters but it only worked the once !
I have a dually for my very strong bargy/planting mare and she can't do anything about it. Its trained her out of it now. I'd certainly recommend one because you can ride in it and tie up from it provided you don't clip the leadrope onto the control rings