I bought it for him after his first month with Birchbox man. He loved this product and, as a coffee addict, can appreciate being able to absorb caffeine through his scalp (weirdo, right?).
The shampoo makes his hair shiny and clean and makes his scalp tingle, he says, and a little goes a long way too. Always nice to get your money's worth.
We will definitely buy more when this runs out -- although it doesn't look like that'll happen for awhile!