I have tried a number of different purple shampoos over the years and I don't rate this up there with the best. It's expensive for the amount you get and the effect doesn't last.

Such a good shampoo for keeping the brassy tones away from blonde hair I use this one a month or when needed to refresh my hair and it’s perfect! 

Highly pigmented, have tried other brands and always come back to this one. Smells amazing. 

This is by far the best purple toning shampoo. It doesn’t make my hair feel dry like all the other toning shampoos and it packs a punch too. Removes any traces of yellow or brassy tones and leaves my hair beautifully ashy. You only need to use a little bit and it works very quickly too. Be warned - wear gloves unless you want to tone your fingers and nails too haha! 

Damage rewind is much better than the original, doesn't dry my hair out. I only use it once or twice a week, sometimes even less. I find that my colour lasts longer as doesn't go all brassy.