I do like this product. So this product does take out brassiness. I have close to platinum blonde hair. The way I use it is to get out of the shower after I wash my hair, put my leave in conditioner in, put my mousse in, then I actually drop these drops right onto my wet hair right on the top of my head where I want it blonder. That works the best for me. Mixing with my leave in didn’t really work for me. To me they are more convenient than standing in the shower waiting for the purple shampoo to penetrate.