I got the 2ml mini vivi nova(I believe to be the genuine one) together as a package when I bought an itaste vv. Previously been using the smoktek version of the mini vivi nova which works well,no burnt taste,good flavor and vapor,but leaks like a blown head gasket.
When I reached home with the new VN,I checked it out and it seems to be much better build quality than the smoktek one.4 little wicks with a pointy top metal washer.
Replaced the head with the 1.8ohm and proceeded to fill 'er up/let it soak. An hour later,sat down and expecting to be blown away with immense flavor and vapor. I was blown away totally.....with immense horrible burnt taste! I let it sit overnight,shake,tilt,priming draw,,,,,same thing. So,dumped the juice,cleaned it and pack it away for retirement in the store room and back to my leaky smoktek.
One fine day,I thought maybe I'll try rebuild the head and use cotton after reading so many positive comments.
As I dismantled it,first thing I noticed,the top of the silicone insulator was touching the bottom of the coil with burn marks,so I trimmed it shorter,wound a 5 wrap coil with 32awg kanthal on a M2.5 machine screw then thread the cotton wick made from cut cotton pad strip.Got 2ohm.
Result is like mountain and sea difference! No burnt taste and flavor is much more,err,fragrant? I even tried blasting the full 11watts from my evic with no burnt taste at all and what I got is a supa saturated warm vape.
I also tried it with a 5 wraps 30awg kanthal,checking in at 1.1ohm. My ego-t even fired it like some vv mod,with lotsa saturation and flavor.
My conclusion is the mini vivi nova is great,no leaking and it's all in the 'head'
