I've got my V3 and spent a little more time with it, although I still need to use it more here's what I think of it:
Pros: Looks like a bluetooth speaker. Not heavy. Two ovens with multiple screens. Comes with concentrate container.
Cons: I can't seem to get the heat to work right. 1 isn't good enough for me, 2 provides me with hardly any vapor, 3 seems to differentiate between decent clouds and absolutely nothing, depending on im not sure what, and 4 is close to combustion, however seems to provide me with the best clouds. The mouthpiece gets stuck in the container after 10 uses it's a PITA to pull out. I mean annoying. Same with this battery enclosure. I mean the battery pops out if i put the unit in my pocket, put it down, look at it wrong, whatever.
Here's another thing I dislike: It seems like when it's heating up what it's doing is providing you with a hit. As soon as it's ready to hit and you inhale there's a large amount of vapor that comes through, and it's almost stale, but then it'll stop, requiring you to SLOWLY milk, which i've had hardly any luck with. I was under the impression that i'd be able to hit this unit hard, slow, whatever.
However, I still think i need more time with it, but it's not what i thought it'd be.