i would use them if you have the money, a lot of people like to diss them becuase they are pricey. . and of their marketing ideas i guess. . ive used iguana juice grow and bloom, mother earth tea bloom, humic and fulvic acid, sensizym, organic b, sweetleaf, carboload and big bud eventhough its not organic. . the kush and grape ape i grew with those nutes was amazing . . i havent tried the pricer stuff like voodo juice or the other powders. . i have nothing but good things to say about AN.. i also followed the calculator they have online, i just didnt use as much as they recommend. .