By far my favourite silver toning shampoo. Used in combination with the matching conditioner once a week (I only wash my hair twice a week), it kept my artificially blonde hair in great shape.
The shampoo is even capable of rescuing blonde hair that has brass-ed badly, however if you leave the shampoo in for too long it can stain your hair purple, or turn it a more silvery colour.
I only had one incident of hair staining, but I did frequently stain my scalp from leaving it in just a tad too long - I liked my hair quite silvery when I used this product. The shampoo washes out easily from your hair, and doesn't feel like it leaves much of a residue.
I purchased a set of the shampoo and conditioner in the tubes and it lasted me around 6 months, I have considered repurchasing in the larger pump bottle form but have decided to colour my hair a darker blonde instead.
It is very strong. It strips yellow tones from hair very easily. When I use it on my normally dyed blonde hair, it sometimes turns a bit too white. It smells glorious, and a little bit goes a long way. My bottle has lasted me so long that I don't even need to use the rest of it.
Tips: Don't leave it on too long - my friend left it on for half an hour and her hair was permanently stained purple.