I love design line's olive oil shampoo and conditioner! I use them both on a daily basis. While the olive oil shampoo is great by itself, my hair tends to feel cleaner and look better when I use both. Only a small amount of conditioner (less than a dime-sized dollop) is needed to reap the full benefits. I tend to buy the larger bottles, and they last forever! I have very oily hair and am not usually able to use conditioner because it increases the oiliness. Design line's olive oil shampoo and conditioner both work wonderfully. They keep my hair looking clean and healthy! Effectiveness I have oily hair, it is often a struggle to keep it looking clean. I also have a dandruff problem. Design line's shampoo and conditioner with olive oil help me control both issues. Scent As much as I love design line's olive oil shampoo and conditioner, the scent is nothing to write home about. It doesn't smell bad, but I have definitely had better smelling shampoos and conditioners. If you are looking for some kind of fragrant shampoo and conditioner...look elsewhere.