There are SO MANY good things to say about these oils. First off, they are, by far, the purest oils I've ever had, and I've been using aromatherapy for years. The smells are gorgeous, and they all serve their uses fabulously and so quickly. I had a headache a few moments ago - pretty bad one, really, and I put Robbers Oil on my Temple and LITERALLY WITHIN SECONDS my headache disappeared. You absolutely cannot beat the cost - I would ( and will) buy them over and over again, and not only do they work excellently, but I was so pleasantly surprised at how big the bottles are. They are at least 2-3 times the size 9f the teeny tiny bottles most oils for that price come in. In fact, they work so well that I would pay 15$ for ONE of these oils - honestly!! This is my first purchase from the Artizen company and I will undoubtedly order more from them, as they leave me utterly overjoyed with my purchase and the quality/ price of their products.