Works well but not really when following the manuals, need to do some tests and calibrate for myself. Also pretty annoying you need to guess how big the plant will be and the plant's requirements, otherwise you end up over/under feeding with the slow release tabs (and shouldn't add any tabs during flowering, so not easy to fix lack of N with this, I got silicium flash for the next runs and can confirm it helps a lot the plants are super healthy and vigorous now, also 30% perlite and 30% worm castings, instead of 75% peat and 25% perlite)