i notice some difference, not as much as people tout but i have only been using it for about a month or so, my plants generally look healthy so its hard to tell when they are healthier than what they are. though im a big fan of, yeah you dont have to use a product, but you can, however i noticed a difference in cloning, rootwise, but then again i use aloe and coconut already, so it could be imagined. what i did notice is some foliar seemed greener and soil structure was slightly improved. but then again i use castings make teas etc. could be anything the way i grow. lol. but, if it helps in resistance health etc, its worth it to me even if it makes them 1 percent better.