CloudsinCrowds, you are entitled to your opinion of course but based upon your screen name I guess you chase clouds (which explains why you want a rugged, 2 battery box
mod). For the vast majority of folk I meet that vape however an 18650 (vtc4) is ample enough to get through a couple days without a charge.
I used to use a Vamo v5 and was happy until i wanted
coils lower than 1.2
I have had my IPV2 since 7/21 and have been super pleased. The box isn't a chunk of heavy steel and an ugly button and awkward potentiometer. It is sleek, light, and clean as a whistle.
I have used everything from my kanger mega (1.5 dual coil ) to my fogger 4.4 (dual build at 1.9) and Kaiser (single at 1.5) and even my Patriot (running .25 ohms dual twisted 28 kathal). I haven't been disappointed with anything I throw on there. If I want flavor.. BAM. If I want clouds... Yep. {The screen BTW draws a very insignificant amount of power.}
I suspect (when the sx330 version 3 100 watt version hits) you will suddenly be interested.