This shampoo is very popular, and while I don't tend to fall for overly hyped products, I totally did and picked up a very small, very expensive bottle of shampoo. Bumble & Bumble Sunday Shampoo is essentially just a clarifying shampoo that you are meant to use once weekly as it's formulated to rid hair of residue, hard water minerals, and pollutants. All good things, and I guess it does that, but it's just nothing all that special to me. Yes, my hair felt clean- as it normally does when washed- but that was about it. It didn't do anything more than that, and it especially didn't warrant the large price tag. While I love a little bit of high end beauty every now and then, this one just isn't for me.