This is the best shampoo and conditioner that I've ever used. I've tried Olaplex, Sebastian, Paul Mitchell and several other brands. My hair is the softest, and best behaved it's ever been. I've always had to wash my hair daily until I started using this, now it's every 2-3 days. I don't frizz in the humidity, my hair doesn't lose its style as soon as I step outside, and my ends still look like I just got a haircut a month after my last cut. I've been able to run styling cream through my hair and just go - for the first time in my life. My hair feels thicker and my scalp doesn't bother me. Anyone that's dealing with grey hair coming in and peri menopause knows exactly how rare this is. The professional formula also means it's super concentrated, I only need 2-3 pumps to wash my waist length hair - another thing I've never been able to say. I bought this shampoo and conditioner at the beginning of May and I still have almost half of the bottle left. I genuinely have nothing bad to say about this product.