Looks interesting to me, and just another method to try if you are having issues IMO. However, you would have to have pretty good lateral control, it looks like.
These folks have a FB page too, and share training info there, just FYI.
I am not here to open a debate, just to share info. Take it or leave it, not debate it. Come to your own conclusions please.
Free Simple Exercise to slow your horse down, maintain correct movement and gain control. | The Horse Training Channel Clinics