I have brown hair with some warmer blonde highlights and used this silver treatment just once, but I already saw a difference right away. The warm tones have started to be neutralized, and my hair looks much cooler and fresher in color.
Besides the color, my hair became incredibly soft and shiny, without feeling dry or coarse like some silver shampoos can do. It really feels like a caring treatment rather than just color correction.
Super satisfied and will definitely continue to use