I received today a box of KR808 cartos in a trade. These are my first cartos ever.
I use a 6V box mod and 36mg juice.
These are 16mg and I'm very much enjoying them. Flavorful and best of all HOT vapor. Warmer than my 901 atty. I can't get the TH I'm used to cause of the nic difference, but the warmth of the vapor is very nice.
I cannot speak to any other kind but these. The box says they came from analog alternative.
Nice! Dunno how long they will last and if they die young it would be a pricey way to go, but for now, it's good. (And I can chain vape with the much lower nic level

)