I'm skeptical about BB balancing; I recently replaced a worn rear Michelin on my second-hand GV250. BB's fell out of the tire yet my replacement tire, a Shinko, made a huge improvement in the smoothness of the ride despite not even being balanced.
I wonder if the Ride-on goop is a scam, too. It claims to not only seal leaks but also balance your tire...yet Slime, another goop, doesn't make that claim.
Comments? Am I just being too cynical? Are those miracle products that seem to defy basic physics any good?