I completely agree.  If it isn't snake oil don't make it sound like it.  North of here they had a retailer push it really hard for a year or two, even hiring the angry little agronomist from Agroliquid.  We were told yields really took a nose dive year three of the program when they got everything mined really good.  One farmer put it pretty good, saying "You can't replace the 3 or 4 hundred pounds of fertilizer you're using with an amount you could pick up and carry with your two hands."