Yeppers, that was moi.
So far, I have wanted to keep it. That could change, but I feel like giving it a bit more time as it's really been quite easy to use. I only had a prob filling it the first time, and that was SOOOOOOOOOOOOOO user error! As in embarrassingly so.

I turned the tank right side up...... without closing it. D'oh!
I remember hearing/seeing that you can use the GS Air coils, but I don't now remember if there's anything special you have to do. Solace, you just exchange one coil for the other?
I've been using the Aspire BVCs in it. I did NOT like the original coil. You do have to swap the center pins of the coils, but even for a "professional modder" such as I, it was really a piece of cake. If anyone does decide to do this, just a word to the wise. Don't toss out the swapped center pin when discarding the spent BVC!
Mine has not leaked even a droplet. And Susaz, I haven't changed flavors, but it seems it would be quite straightforward and not a pain at all. Nope, the batt is fixed, as it is in so many of our current selection of itty bittys.
pokes, I've found the air hole to be doing its job when I fill it. You do have to prolly go a bit slower than other tanks, but it's not gushed out or caused me sleepless nites...... yet.
I never had a V1, so I'm certainly unqualified to make any judgement calls on the diffs between them.
All in all, she's a cutie, and she's growing on me.