Nothing wrong with silver solutions made with a good home generator. They usually work, though it usually takes more. I like the idea of having both the really good stuff "just in case" and making your own for general use.
Keep in mind that when you make it at home, you have minimum production equipment costs, no facility costs and no employees and overhead, etc. It takes hundreds of thousands to duplicate the facilties and equipment of makers like Utopia Silver and Purest Colloids. And, as just one small example: Utopia Silver uses two inline filters to ultra purify their spring water. They change the replacement elements frequently - and each replacement element costs more than the typical quality home generator. And that is just a drop in the bucket. Kinda hard to have a very high voltage, reversing polarity submerged particle beam setup at home and make your own ultra small particle silver for pennies . . .
In the test you refer to, one of our members posted the results of spraying bread slices with Utopia Silver, homemade silver and another commercial product. The homemade silver and other commercial product developed mold in only a couple of days whereas the slice sprayed with Utopia Silver was still mold free two weeks later.