I also really love this halter/bridle combo and wondered if it would irritate my mare since she will be bobbing her head. I sure would not want beads banging on my forehead and nose. But it might also work like the rhythm beads as well.
I have ridden her at a flat walk but not in gait yet, she came pretty spoiled and we are working on that on the ground first. We have not even gotten her up to a gait while lungeing yet either. I do have a professional trainer, but she has not worked with gaited horses. Right now the priority is respect first of course.