it works but not the way they say ....you can do at most 2 plants and you have to flower very very early because the pants will out grow it ...i can say it did teach me how to adjust ph ...test ppm and other basic hydroponic techniques...but it definitely was NOT worth the money ...unless money is not an object ...you can get better for less at any hydro store and even better right here on the net...it is not a good investment because after the first grow you realize you have out grown it...and you have to spend more money...lol