This product works well and freshens colour up. I only gave three stars as it also left colour in my bathroom (worse than washing out hair dye). I'd probably only use again in hotel bathrooms because it took 3 cleans to get my shower base back to white.
I purchased this product to address the brassiness and dryness in my blond hair however I didn't feel like it did much. My hair wasn't noticeably less brassy or more shiny. I didn't think it was worth the price and won't be repurchasing again.