Thanks everyone for your response(s). Nothing like input from other riders! I am looking to this product more for the balancing than for the sealant properties. I too, have only had one flat in all my years of riding so that is a minor consideration.
There is a large firm in the USA that rents motorcycles (only Harleys?) name something like Eagle Rider that, I understand, now uses Ride-On in all their bikes tires. Results indicate longer tire life and less repair time.
Also, like someone else said, there are more and more truck fleets using this stuff with good results.
The product, according to the manufacturer, is inert and will not effect any type of metal with corrosion or rust.
So, I am still left unsure whether to use or not. The temptation is to wait until near the end of a tire's life, insert the product and find out for myself if there is any benefit and/or deleterious result. Thanks again!