about 4 mos ago…lol.. so I dug out my Vinci x and built one in less then 5 min.. Great Flavor! No leaking like stock coils… Left it sit all nite , still no leaking. I’m amazed … not sure how long one coil will last. But I have 3 coils and 3 Vinci x’s and about 30 rebuilds. So great for on the go…outside when working or hanging out in crowds ( if I ever go out in crowds again) lol.. But I am truly amazed
that these work this well… Worth every penny.