These looks like quality sticks!!! Did it have that typical, green, minty freshness? Or that "coolness" type affect, usually this happens either at the start when I burn my kynam, and green is especially minty usually, but doesnt have to be, the green kynam I got 50g of sliver of is quite cheap and doesnt have that full on minty, freshness, but a weak coolness then onto the sweet note of cinnamon, I dont use them often because I can get really sick of the sweetness, but the Black Kynam I got is 10/10. Those are the square looking sticks, I loved trying one of those with a batch of a hybrid kynam called golden kynam cultivated in Nha Trang, the seller gave me an a very old pursat and a sinking white kynam stick that was the square ones. I want to try more of those types of sticks, I dont know how the coils work, could you explain how you use them?