The shampoo did more wonders for my sister than me. She used to have silky straight hair, then wavy, and now curly ends. I don't know how this science works, but I could really see defined curls, and that too after one use of shampoo and conditioner. It works well for her.
On the other hand, I'm yet to understand why this didn't work out for me although I do have wavy and frizzy hair. Maybe my hair is lacking moisture, idk, but it's genuinely a great product for daily shampooing.