Another update:
(I hope you guys don't mind that I'm posting these updates - it's just that I really want to give those sitting on the fence a good idea about these, and, like we were talking about in the ViVi thread, first-impression reviews are not always accurate; I want to give sort of "progress reports" once in a while, for a fuller picture)
I left it lying on its side with the Tidy in it overnight. No leaks this morning.
Note to self: The Tidy is a bottom coil, so it does better when held vertical-ish. I gotta get out of habit of tilting too much.

After a whole night in the horizontal position, I had one "dry-ish" hit, and after that - perfection. I think this carto takes a bit of time to break in. Because this morning the taste is even better, and the vapor is much greater than in the beginning. I'm soooo impressed with it. Chris, Dan - please sell five-packs of this guy or something, and in more sizes? People will *love* it. (Colors won't hurt at all... LOL)
This particular carto is 2.2 Ohms. The iTaste recommends 3.3 to 4.1 Volts for it. I decided to really put this thing through it's paces, and loaded this one with a fairly subtle tasting vanilla juice - it gets very easily lost in most clearos. Not this one. At 3.3 Volts the vape is just warm enough to be enjoyable to me (warmer than I could get the regular resistance Phoenix to go on the ProVari without dry hits), and the taste is creamy and certainly strong enough to be pleasant for me (and I like stronger juices, normally, my taste buds are on a weak side). At 4.1 V the vape is quite warm, as to be expected. I took six very quick vapes in succession, and not even a hint of a dry hit. I stopped at that point, because this juice is kinda delicate and doesn't do good at really warm temps. So the lesson here is: The recommendation given by the software is spot on, at least for this carto.
So I decided to really stretch its legs, and put up the batt power at 5V. And, guess what? This carto can handle it. I couldn't chain-vape it, but not because of dry hits - the juice-in-the-mouth thing becomes rather pronounced at this power, I had to wipe it every other hit if I was taking short drags, and every hit for longer ones. Kinda hot, too, expecially when juice gets on the lips. Yikes. But the flavor is awesome, even for my delicate juice. Yeah, this carto is rather spectacular: a range from 3.3V to 5V for a 2.2 Ohm bottom coil is impressive.
But here is another interesting note: the carto is really a tad small for most regular 510 drip tips. I don't think it's a good idea to stretch the tube and disturb the vacuum? But one drip tip did actually fit without pushing it: the ceramic one. With it in, the condensation problem goes away - at least it doesn't get on your lips - and you can vape away at 5 Volts with no problems, other than it's better not to chain-vape too much since it's pushing the carto just a little. Of course the configuration with the drip tip doesn't fit under the cap, so I am not going to vape at 5V when I go out. But, frankly, real hot vape is not my thing anyway. At least we know it's possible.
Another note to self: If you take *really* strong, fast pulls at higher temp, you can get a drop or so of juice in the mouth once in a while. Not much, but enough to remind me to take slower, more relaxed drags.
Still love this batt. The color is sooooo pretty. It's really dark green-ish in cooler light, and nice deep rich purple in warmer light, like the incandescent lighting in the evening. And it really plays around in the sunlight. The little perlescent specs become more visible in bright light and give the color a lot of depth without being in the least gaudy. It's downright elegant - exactly what I was yearning for in a PV... Definitely will be getting the white next, when the separate caps come out.
So far, this is actually pretty much the best batt-carto combo I've ever tried. No kidding. Of course, I haven't been using a Stardust on it, which I'm going to do shortly. But I know the Stardust doesn't have this kind of range for me. And the batt is definitely higher grade than the Twist - not that it takes anything away from the Twist, it's just more sophisticated and much prettier. And, of course, there is the matter that you can't see the voltage numbers on the Twist easily, while this pup has this beautiful, bright, large display.
Vape haven so far.