Ok, just received mine today. Serial # 0254....
Overall, pretty good quality. Everything fits together pretty smoothly, but you do have to be careful with some of the pieces and the threading, not that it's bad but just some really fine threads and if you force them I could see where you might have them gall up on you...
Anyway, the bottom assembly.. It is confusing. I've managed to get used to it and now that I have it's fine. I'm using it with both rings in it, juice flow and wick retainer and the dual coil deck, and Drago cotton (pain in the ass to work with but good shit when you get it right).. The trick with the wick it seems is, just make your wick long enough to get about 1/16" past the bottom of the retaining ring; don't try to fill the whole channel. Also I thinned my wick a bit and cut it diagonally to make it easier to stuff in. If you put too much wick in it you will get dry hits. Too little, and you will get leakage I assume (though it hasn't happened to me yet). I'm using 70/30 vg juice and it's loving it.
Once you get the wicking right, then I can see the need for a juice flow control. This thing can guzzle some juice. The flavor and vapor are pretty damned good for a tank in my opinion, on par with my Tugboat v2 RDA for reference. I can taste several layers of flavor in the juice I'm using and it's not really muted at all. The juice I'm using is a blueberry-custardy cream mix I made and it's deep. I'm using non-spaced dual 26ga coils wrapped 7 times around a 2.4mm screwdriver, and could probably wrap around a 1/8" diameter and still fit them on the deck if I tried. Came out to right at .4 ohms and I'm vaping at 40-45w. 2, 3, 4 second hard pulls with no problem or hint of dry hits. I'm sure with the right coils I could vape at as high a wattage as I would ever vape with my dripper (I usually don't go above 80w or so). I've also read that spacing the coils makes it even better with regard to flavor, though I haven't tried it. The post holes look like they will easily take 24 gauge, and maybe even 22 gauge wire. Be careful with smaller wire as the screws can cut your leads.
Overall, I can see where people would get frustrated with it a little bit. Kind of over-engineered, though I give them props for their line of thinking. But man, I can see where this is going to be my go to tank. For the money and what you get, you can't go wrong once you get used to it. Definitely worth having in the collection. I love the velocity style deck, and I'm sure I will like the single coil deck too, but it seemed a bit restrictive for my taste just pulling air through it to see what it was like. Anyway, buy one if you like to tinker on things to get them just right. It's worth it.
NOTE: Gotta be careful refilling with the juiceflow open.. When you put the top fill cap back on it makes pressure and can push liquid back through the airflow holes..