Had these installed a few days ago along with some new 'Stones front and rear. Oh my goodness, what an experience. The ride feels like I'm carving the road with the precision of a scalpel. Just amazing control and almost erie balance through turns. I have to think the dual "gyroscopic effect" if you will, of each unit on both sides of the front wheel assists with this. As you turn, the inside balancer will be compensating somewhat differently than the outside balancer. I don't know all the physics here, but that's how I played it out in my head.
I added a fork brace to the hot rod and few months ago and it made a nice splash in ride stability overall. Now adding these balancers have pushed that to a whole new level. The feeling is almost magical...even makes me a little giddy when I feel it. Even road bumps seem damped more than before. In my opinion, these things and a fork brace are must-haves. Everything else seems almost superficial by comparision.