Riding in a rope halter is much more effective then riding in a flat nylon or leather halter. It provides pressure to delicate pressure points on the face and top of the poll, like a hackamore. I have started green horses with rope halters, and they have done great. When they start to push through it then you move them into a simple O ring snaffle or D snaffle and incorporate that with the commands of the rope halter. It works really well, and the horses come off working well out of the halter.
Shaneequah, 1998 gaited Bashkir CurlyxArab mare
Johnny Cash, 2001 Arab x pony gelding
Brighty, 2013 Standard Donkey jack