I received my ProVari mini in the mail today. I imediately unscrewed the bottom cap and placed a fully charged 18350 in the tube and replaced the cap. Then I grabbed a clean Vivi Nova mini and screwed on a 2.4ohm head and filled it up with some 12mg Coffee Bavarian Cream, and screwed it on my ProVari. Set the voltage to 3.0 and tried it, it was a little weak. So I tried it at 3.5 volts, then 4.0 and then I tried 4.2 volts, and since then I have been in vaping heaven. It has so far been all that I expected it to be and more. I was happy with my VMAX's, Ego's, and box mod, but now I am in heaven.