I only just picked up my BVC Nautilus Mini tonight, so I haven't had much of a chance to vape on it. Right now I'm still just basically fiddling with it, slowly turning up the voltage to break in the coil, and finding which adjusted level of draw I prefer. I think the tank itself is pretty attractive, though it definitely radically changes the appearance and way I handle my iTaste vv v3.0. So far I've brought it up from 3.3 volts to around 3.8 volts. At 4+ volts I was starting to get occasional hot vapor spikes, and throat hit was really a bit too much for me. I also had some brief gurgling while I was making draw adjustments, but that appears to have mostly gone away. That might just be due to my possibly having over diluting my heavy VG juice. I'm not sure what to do when this device gurgles, as I can't just blow juice out the bottom through the air hole - as there is none that goes all the way through and out the bottom. I've not had any leak issues as of yet.
The increased throat hit is generally a good thing for me as I ramp down the amount of nicotine I use in my e-liquids. The Nautilus Mini feels like it has the least muted flavor impact of the 3 different bottom coil clearomizer tanks I've tried so far, but it has yet to truly "wow" me. I do like being able to adjust the airflow. That has been helpful in achieving the maximum "sweet spot" the device is capable of achieving. All of my other clearomizer (top or bottom coil) models typically have their head's usefulness die out on me after only 1 or 2 days. I will be pleased if I can truly get a week or more of vaping out of this tank's coil before I have to replace it, but so far I've only used it for half an evening.
Other than their short lived coil head life, which is no small issue, I actually rather like the vape I get off of my Triton system tanks. They are a top single coil design that is top, rather than bottom, filled. For me, that top fill design is a pretty handy feature, especially when I am out driving for long hours. (Yes, I refill my top fill tanks while driving sometimes. It is pretty easy to do safely with a bit of practice.) I can't do that with any of these bottom fill models. Flavor delivery is also pretty good compared to most bottom coil designs I've tried so far, with no real leakage issues. I may have to find an eGo threaded version of that Triton tank to try out on my variable voltage iTaste. I may not really need much more than the equivalent of that. The Nautilus Mini's flavor delivery early on is nearly as good as that of the Triton tank. I'm still "breaking-in" the Mini, so I'm hopeful it will perform even better as I continue to vape it. How much better remains to be seen.
I have a few observations of note regarding the Aspire Nautilus Mini I received. It came with two 1.8 ohm coil heads. It came fully assembled with one of those already installed. There was no 1.6 ohm head, indicating that Aspire might be completely dropping those - even as a separately purchasable replacement. To my surprise (as I had been led to believe otherwise), the battery contact is spring mounted on the Mini, just like on the larger Nautilus. I like that feature. That way I can tighten up my setup enough that the aesthetically required beauty ring (for mounting on the iTaste) doesn't freely rotate - while still being sure I'm not damaging either the tank or the battery in the process. The airflow adjustment ring has click stops at each of the 4 air holes. These clicks stops only hold fairly lightly, so there is a chance of the ring inadvertently being rotated away from your desired draw setting. The ring can be infinitely click-spun in either direction, so it is easy to lose track of which size air hole you are on. The difference between each air hole size is not all that clearly marked. Pictures I've seen of the latest Aerotank models indicate to me that Aerotanks are much more visually clear about which air hole size you are set to. Other than that I don't know much about the Kanger Aerotanks, so I can't compare them much in any other way to the Aspire Nautilus tanks.