Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Took 20 years off my hair

I was kind of hoping that this shampoo and conditioner wouldn't be that great, because it is a little expensive. Turns out it really does make a difference. I am 44, and my hair was turning into "old lady hair". Fine and wavy - it looked thin and frizzy and kind of dull. Now, it is full and vibrant and pretty again - yay! No more old lady hair for me, I'll continue to cough up the cash.