The IGK Color Depositing Mask in Cyber Tokyo is a game-changer for those looking for long-lasting color. Halle, the reviewer, was impressed by how the mask stayed in her hair even after washing it once. She mentioned that unlike other masks, this one actually stains, which means it stays in your hair for a longer period. Halle also highlighted that if you're tired of semi-glosses that don't do the job well, this mask is the perfect solution. However, she did mention that the mask can stain your scalp and hair, so using gloves is essential. Overall, the IGK Color Depositing Mask in Cyber Tokyo is a reliable option for those seeking vibrant and long-lasting hair color.