I avoided cinnamon juices because of controversies I read in this forum. I thought I didn't want anything that would cloud or crack plastic clearomizers. Then I got brave and tried a couple of teaberry flavors from various sellers. Those ruined my clearomizers, one of them before I even finished filling up. Then I got a free sample of Fuego with an order from Velvet Vapors. I didn't know it was cinnamon, so I squeezed some into a clearo. There was no clouding or cracking then or ever after. The flavor is a wonderful warm tingly cinnamon, strong but not overpowering. I add a little spun sugar eliquid to sweeten it, but not too much or it dilutes the tingly strength of the flavor. I can't find out, on the Velvet Vapors website, whether or not it contains any cinnamaldehyde. I'm with all vapers who want more disclosure from eliquid makers. In the mean time, fuego has become a regular reorder for me. It hasn't made me short of breath, but I think we all have various reactions to ingredients and flavors. I also think you can't make cinnamon an all day vape or you'll numb your taste buds. I like switching out flavors constantly anyway. My two cents.