This serum smells really good and a little goes a long way. You don't need a lot, even if you have longer hair. I will say this does nothing for my hair unless I use it as a sealant by preceding it with a leave in/moisturizer.
This oil helps tame the flyaway strands that I occasionally get. It seals against damage when using flat irons too. When I pair this with the shampoo/conditioner and use my flat iron, my hair looks like silk!