Just started using the rebuildable portion of the tfv8 . Took about 5 tries to get the Wicking down , and using demon killer coils as the price for the quantity and variety is unreal. I may try building my own coils eventually just for fun but for now I love these. After discovering how great the flavor can be when it's done right I'm sold on rebuildable. Not to mention zero dry hits , seemingly better nic delivery and waaayyy cheaper than replacing coils. Oh and the clouds bruh, let's us never forget the clouds lol. I regret wasting so many years with boring old smokes when I could have been vaping on the ruleaux 2/3 with a tfv8 tank with dual tiger coils @ .25 ohm @120 watts chucking clouds of hellacious flavor fury all over the damn place. Kidding about the clouds I'm not an ... about it but if I'm alone the cLouds do fly my friends . Oh yes they do.