i have heard this same snake oil marketing scam for over 30 years. think it over.
I was a skeptic also. That is why I like this site, reliable first hand experience. I just installed a new front Dunlop 408f on my 09 USE4 and have had great results.
It works....I have tried varying the speed from 10 to 110mph, smooth and rough roads it works.
I can tell you countless stories of tires that where balanced with weights and at a certain speed would have a very annoying vibration. I am one of those guys that this drives crazy. Trust me if there was a negative result or problem I would notice and would have no reservation in letting you know what it was.
Dynabeads work for me!
You can read a number of members here who have used beads with positive results, I have only heard negative comments from those who have never tried the product.