I tried the Phoenix TC cartomizers for the first time. I am fairly new at this vaping experience, but these coils aren't really rocket science. I have had alot of problems with these cartomizers. When I try to fill the cartridge it floods. I think it is coming up under the silicon seal on top. I can see it bubbling over the coil. I have tried both hole, I have tried filling extremely slow, but it still floods. I have to keep a paper towel over the bottom as it leaks out the bottom of the cartomizer. Another thing it has given me problems with is pulling fluid out of the cartomizer when I take a draw,and putting it above the silicon seal above the coil. I have to take the drip tip off and twist a paper towel up and wipe out the fluid from the top part of the cartomizer. I have taken the top seal off and replaced thinking I might make a better seal somehow. This has happened on 2 cartomizers, I have only opened 2 out of the box. I might try the bottom coil next time and I might give up on the phoenix line. I bought a vivi nova, might just go that route. Just my experience with these. Thought I might post this to let someone know that is thinking of trying some issues they might possibly have. I would think the bottom coil would work better.