This is the conditioning treatment that is meant to be used with the Blonde.Angel.Wash purple shampoo, although I suppose you could use either product in isolation if you so choose. I have been using the shampoo and conditioner combo since I dyed my hair warm blonde, and it has really helped to turn the colour beautiful, golden, and not at all brassy. If I go too many washes without using it, I can notice the difference- the colour gets a bit too yellow or orange, but in one wash, the Kevin Murphy Blonde.Angel system fixes it! You can see my review for the shampoo for more details about the colour benefits.
In regard to the conditioning benefits of this product, it definitely restores moisture quite well. Right after incorporating this system into my routine, I noticed a difference in the texture, softness, and health of my hair. I docked one lippie because my hair got used to it after a while, and I'd say it could stand to be a bit more moisturizing. But since you don't want to use the purple system every day anyhow, I wouldn't write off this product for that reason- just alternate it with a richer conditioner if you suffer from dry hair. This product also smells the same as the shampoo- a sweet floral scent that I really love, and it does not stain your hands or skin unlike some other purple hair treatments.
Here's how I use it: I only wash my hair every other day, and I use the Blonde.Angel system every other wash, working out to 2-3 times a week. After using the Blonde.Angel.Wash, I take about a quarter-sized dollop of this, apply to my hair, comb through with a wide-tooth comb, and then add a teeny bit more to my ends (this conditioner is a bit thinner and less concentrated than the other Kevin Murphy conditioners I've tried, so I use a bit more than I would with my other conditioner, the Hydrate.Me rinse). I then leave it on for about 3-5 minutes or sometimes more, depending on how much toning I need to do.
I definitely recommend this product, and would always buy again for as long as I have blonde hair!