Man, this RTA is gorgeous. I think it's one of the most beautiful tanks today.
It's initial setup is not difficult. A simple dual coil build with a wick that touches the bottom of the deck, where sits the four SS wicks. Not difficult at all, actually I find Zeus X much more complicated to wick.
This is a metal-wick tank. Which means juice comes to cotton via four cords made of intertwined stainless steel lines. This design is what makes this tank so beautiful and so special. But two things here can botter some people, not me at all. First, this RTA is tall. A lot tall. Much taller than my Voluna 2 and Zeus X. If you're used to KF and another German RTAs that wouldn't be a problem, but if you like small tanks so it's better avoid Brunhilde. Second, the metal wicking design makes this RTA difficult to use with less juice. In this situation I found it easy to produce dry hits, although I assume this can be due to a bad cotton wick. I need to try another setups to see if that's the case. With normal levels of juice, though (more than or exactly half tank, I mean), the vape is dense and full of flavour, as the coils is actually very close to the mouth (it sits in top part of the tank).
Well, I thinks that's it. If you like the style or design of this RTA, I simply can't recommend it enough.