Yes, I've used it many years, it's the standard that all others have to beat. It's an excellent basic salt formula, with all trace elements, easily adaptable, with very good pH buffering. You may want to use some additives with it, like GH's new Floralicious Plus, which sounds outstanding.
I've also used fulvic acid for years. It's very beneficial when using chemical nutes. Garden Knome, Why do you think that it is unnecessary?