I noticed an absolutely awesome color toning change after one use. A lot of brass was neutralized.
However, I noticed an abnormally large amount of hair that I was losing in the shower while using this product along with the conditioner. I am used to a certain amount of hair coming out during a shower, but this definitely made me rethink buying this item. If I need a tone correction done once in a while, this is definitely a great product, but I wouldn’t use daily/regularly.