Moroccanoil Blonde Perfecting Purple Shampoo is a popular choice among individuals with blonde, lightened, or grey hair because it is specifically formulated to neutralize unwanted brassy and yellow tones. Here are some reasons why this product is considered better than other similar products:

1. High-quality ingredients: The formula is enriched with high-quality ingredients such as argan oil, which is rich in antioxidants and nourishes and moisturizes hair. It also contains violet pigments that help neutralize brassy and yellow tones.
2. Effective: Moroccanoil Blonde Perfecting Purple Shampoo is highly effective in toning and neutralizing unwanted tones in blonde, lightened, or grey hair. Many users have reported visible results after just one use.
3. Gentle: Despite being highly effective, the shampoo is gentle enough for regular use. It doesn't contain sulfates, phosphates, or parabens, which can be harsh on hair and scalp.
4. Versatile: This shampoo can be used on a range of hair types, including blonde, lightened, or grey hair.
5. Brand reputation: Moroccanoil is a well-known and reputable brand in the hair care industry, and their products are trusted by professional stylists and consumers alike.

Overall, Moroccanoil Blonde Perfecting Purple Shampoo is considered better than other similar products because of its high-quality ingredients, effectiveness, gentleness, versatility, and brand reputation.

Moroccanoil Blonde Perfecting Purple Shampoo is designed to tone and neutralize brassy and yellow tones in blonde, lightened, or grey hair. Here are the steps to use the shampoo:

1. Wet your hair thoroughly.
2. Apply a generous amount of Moroccanoil Blonde Perfecting Purple Shampoo to your hair and scalp.
3. Massage the shampoo into your hair and scalp for 1-2 minutes, ensuring that it lathers well and covers all of your hair.
4. Leave the shampoo on your hair for 3-5 minutes, depending on how much toning your hair needs. If your hair is severely brassy, you can leave the shampoo on for up to 10 minutes, but be sure to keep an eye on it to avoid over-toning.
5. Rinse the shampoo thoroughly from your hair, making sure to remove all of the product.
6. Follow with your favorite Moroccanoil conditioner or treatment for optimal results.

It's important to note that this shampoo is very pigmented, so be sure to use gloves to avoid staining your hands, and be careful not to get the product on your clothes or towels. You should also avoid using it more than once a week to avoid over-toning your hair.

Pros:

1. Tones and neutralizes brassy and yellow tones in blonde, lightened, or grey hair.
2. Enriched with high-quality ingredients such as argan oil, which nourishes and moisturizes hair.
3. Effective after just one use.
4. Gentle enough for regular use.
5. Can be used on a range of hair types.
6. Reputable brand in the hair care industry.
7. Leaves hair feeling soft and smooth.

Cons:

1. Expensive compared to some other purple shampoos on the market.
2. Highly pigmented, which can stain hands and clothing if not used with care.
3. May not work as well on very brassy or yellow hair, requiring multiple uses.
4. Some users may find the scent too strong or overpowering.

Overall, Moroccanoil Blonde Perfecting Purple Shampoo is an effective and high-quality product, but it may not be the best option for everyone due to its cost and highly pigmented formula. However, if you're looking for a gentle and effective purple shampoo to tone and neutralize unwanted brassiness in your blonde, lightened, or grey hair, this product could be a great choice for you.