Redken Frizz Dismiss Shampoo

I have dry and coarse hair that easily becomes frizzy when there is relatively higher humidity, so Redken's frizz-fighting hair care line caught my eye. This shampoo is sulphate-free, and the description says it's safe for color treated and chemically treated hair (which I have). I found that it was a bit hard to get this to lather well, especially on days I have applied hair treatments or hair oil. Sometimes more water and more shampoo is needed. So the 300ml bottle did not last me very long on my long hair. It is gentle and non-stripping, and it does reduce frizziness somewhat when used in combination with the conditioner. The issue I have with it is that it feels like it doesn't clean that well. It's difficult to get the balance just right. Redken is pretty expensive, and given that this wasn't a hit for me, I won't be repurchasing.