It looks from all the reviews that this guy is the mother of all vv designs. If I already have 2 inferno batteries and a 5 ml tank is one of these worth the investment ? It would be a totally new setup for me. I have only used the inferno so i am not used to something with a separate battery like this bad boy. I like it because it has the 510 connection so everything i have will still be usable on it if i do get one. How hard is it to get used to the vv ? thanks for any input and Happy New Year !!