I am cursed with fine, thin hair, and I was sceptical, but this is great! My hair does still go flat after awhile, but a quick run through with my hand brings all the volume back, and it holds again, nothing else I've tried comes close to that.
It is also amaaaazing as a dry shampoo! If I wash my hair Sunday night, then before bed on Monday night I'll put this in, on the Tuesday morning all the limp, oily, stringyness I would normally have is gone and it looks freshly washed. The watermelon smell is nice and dissipates quickly. Definitely a game changer for me!