Balance beads

Has anyone tried anything like this? http://checkeredflagtirebalancebeads.com/ I have been looking it up on the net and either it's great or it's snake oil. What do you think? There are different brands, types and sizes. From air soft ammo to BB's for the DIYer. I was think of using my bubble balancer and throwing some beads in a new set of tires for my beater.