I just got my Vulcan yesterday. First impression: It's big. The Vulcan is even slightly taller than my Viking, which itself is a very tall RDA.
I did a dual coil build on it: 26g kanthal, 5/64 drill bit, 8 wraps each coil. I put a little offset kink on the left side of each coil, in order to get a little more space on the left side. The posts are a bit far apart, sort of like the Tobh. I do like the fact that they are staggered in height, to compensate for the way the wires come off the coil, instead of level, like in most attys. Again, this is Tobh-like. I don't care for the tiny knurled screws. They're too little for my old fingers to get a good grip on. Next time I rebuild, I'll probably change to phillips screws.
Vape wise, it's a real flavor type atty. Not really a cloud chaser atty, although I get adequate clouds from it. At first, I didn't think I was going to like the fact that the natural coil height is so high, in relation to the air inlets. I'm more used to RDAs with low coils, set right in front of the air holes. But for some reason, it works. The air flow seems to be directed up under the coils. Not sure how or why, but it does. The cooling fins seem to be nicely functional too. I have vaped it pretty hard, and the Vulcan itself actually stays cooler than the mechanical mod it's screwed onto.