Personally, it didn't do anything to my hair. It was a bit of a purchase failure. Besides not doing the job, it left my hair very dry.

It is the best silver! I am getting it for the second time and in combination with the conditioner, it does the perfect job for blonde hair. The fact that it leaves the hair dry is logical since all silver products work like that, but if you use a mask, it's fine.

It truly neutralizes the yellow tones in blond hair and restores the coolness of the tones. It doesn't leave the hair soft, but you can always use conditioner afterwards.

I have been using it for years and it indeed removes the yellow tones. Another positive aspect is its low price.

It removes the yellow tones but leaves the hair very dry. It definitely needs a conditioner or a mask after using the shampoo.

After a month of use, I can say that it removes the yellowing BUT it worked for me in a specific way:
On damp hair and not wet.
Sufficient product on each strand. Initially, I simply apply it, leave it for half an hour - at 5' on short hair with balayage it did nothing - and a little before rinsing it off, I massage it all over the scalp.
It is the first time I use silver, I don't know if I'm doing something wrong (I have tried it in all ways) and I believe that this is a bit time-consuming.