I am a big fan of purple shampoos, so I was excited to receive a bottle of this to try. Unfortunately I found it was much less effective than my previous brand, Fudge. I like to have my shampoo leave me with that greyish-purple hue, but this is not that type of product. I would notice my hair was slightly less brassy than after my regular, non-purple, shampoo, but the difference wasn't major.
On the plus side the bottle was easy to use and the shampoo smelt lovely - important because some purple shampoos I've tried have smelt horribly strong!
I think this would be a good product if you just want a slightly toning effect for natural blonde tones, but if you're after that really grey tone, this product is not strong enough for what you need.
I tried the KMS California Blonde shampoo approx two months ago, I love the smell of it to start with, and the 300mL bottle has lasted me ages! My supermarket brand shampoo doesn't last half as long! I haven't noticed much of a change in my tone of blonde, but it has definitely kept it from turning as brassy as it does without it.