It worked perfectly for me!
I have tried many sulfate-free shampoos and this was one of the most remarkable. It left my hair soft, smooth, clean, and without weighing it down or drying it out. Its quality really pleasantly surprised me.
It probably depends on the hair type.

It is very good, especially if you are undergoing keratin treatment. It makes the result last much longer and moisturizes. Due to its composition, it also works for hair that has not undergone keratin treatment and moisturizes it. The scent is wonderful and subtle if you are bothered by strong smells like me. Don't worry if it doesn't lather much, it's normal, as regular shampoos are just "foam makers" and don't actually clean effectively. I have been using it with conditioner for 1 year now

First of all, I have to say that my hair has undergone many technical treatments, including decolorization. I bought the products without reading any reviews, and when I saw them, I was ready to cancel my order, but luckily I didn't give in and didn't do it. Firstly, the scent is wonderful (I generally have an issue with smells), but this is purely subjective. Secondly, it left my hair incredibly soft and very lightweight (in combination with the conditioner). I don't understand the negative reviews. However, on my own hair, which is quite damaged, the products worked very well. *I have tried other professional products that are much more expensive and they didn't perform as well. Another plus for me is that the packaging is large!

I didn't like it. Neither the shampoo nor the scent. It leaves the hair very dehydrated and frizzy - tangled. My hair is thick and curly. It seems like something went wrong. I expected more softness. It makes minimal foam and it annoys me, you have to use half the bottle. I used it after a keratin treatment.

I tried it on hair that has undergone keratin treatment and the result was impressive. Before applying cream and hair mask, it leaves the feeling that the hair will remain tangled forever, so it is necessary to use the appropriate product afterwards. I don't know if it maintains the keratin because the application was done a month ago and I only used this specific shampoo once. Compared to the blue one from the same series, this one is definitely better for my very thick hair.

It leaves my hair somewhat dehydrated...it's not worth the price it has...
Indeed, it maintains the keratin in the hair!

It makes my hair dry and not at all soft. The only good thing is its scent. I will not choose it again

I was completely disappointed. I expected it to do a much better job due to the price, but it doesn't clean the hair adequately. However, the keratin does not actually come off as you use it.

Excellent shampoo. For those who have undergone keratin treatment, it prolongs the result and leaves the hair shiny and smooth. Even better when accompanied by a mask or conditioner.