I have been vaping the inferno for about 2 month and the quality of the tank tube itself is very poor. Don't get me wrong I love the thing. The tube tank had hair line cracks all over it. I was told it was just cosmetic and would not affect the functionality from cs. I don't think anyone feels safe in vaping something with a crack. CS told me since the kit was bought in october, there's nothing they can do and that I should buy replacemnents. It's not about the $2.99 replacement but rather the principal on honest and good customer service. The warrenty info on your site doesn't even say anything about the tubes, only cartomizers and atomizers. So what good is my warrenty? Needless to say I'm dissapointed. Even if I did buy replacements, it will probably will crack again. I don't even think the tube tank is Polypropylene.