I recently added lowlights and highlights to my already coloured hair - I suppose the best we can do is take care of our tresses if we colour treat often. Loved the products from the first wash - the shampoo especially since it left hair clean as well as detangled, and smoothness could already be felt after shampooing alone. The conditioner adds extra sheen and moisture, and leaves hair ready to style. I really like the conditioner tube - no matter what in-shower obstacles you encounter, it's easy to open and close. I have been using the mask instead of conditioner every 4-5 washes and it is very nourishing and softening - I especially like to use it if I plan to make my hair dead-straght, it feels like it makes the process easier. I would not recommend it for very fine or thin hair. As far as coloursaving is concerned, I am possibly not the best test subject since I wash my hair daily. But so far so good, it has been a week since my last hairsalon trip, and the colours still look the same as on the first day.