The thing is we'll never know what's really in it. Seller could have imported cheap whey from china and reduce the amount of whey in the products, substituting it with glycine and taurine.
Says his products haven't been evaluated by the FDA, when we don't even have an FDA. We have a TGA.
I'd say it would be more safe if you purchased unflavoured whey from a different reliable and reputable source and separately buy flavouring from companies such as bulk nutrients or nobull.