love this shampoo so much. unfortunately, the cap isn’t very secure and my bottle leaked (a lot) during a flight. apart from the packaging, it’s amazing

This is definitely high quality and does what it promises. I have oily hair and there are times when I feel that it’s not enough to clean my oily scalp. This is why I combine it with the other olaplex shampoo once or twice a week. 

It's a very nourishing but simple shampoo. I have scalp psoriasis, and for the last 3/4 years it's the only shampoo (non treatment) that doesn't exacerbate the inflammation. I believe that there could exist better formulas at a better price, however this works great for me. 

My bleached hair loves this shampoo, and you only need to use a tiny bit

This was recommended from my hair dresser (whose salon actually doesn’t sell this brand.  Hair is smooth, healthy, manageable.  Will purchase again