Nature should, in many respects, be admired. Sadly, not all essential oils really represent nature at her finest. Cassia oil is a case in point. Where true cinnamon oil seems to me to represent a perfect showcase for the main ingredient, cinnamaldehyde, cassia oil in contrast smells as if it has been thrown together by a madman on a Friday afternoon, the extra ingredients simply highlighting the worst aspects of cinnamaldehyde. This may seem a little overstated but some oils actually are more interesting and impressive from a creative point of view than others.