I received mine last week, it has easily become my go-to RDA. It has a huge build deck and post holds similar to the Mutation X V3. What I like though is that I can change out the drip tip (It comes with three options) from a chuff style down to a 510 adapter. (It comes with a delrin and a steel 510 drip tip as well).
I tried multiple builds my first day including dual parallel coils at .18 Ohm, as well as dual Clapton at .25 Ohm. I finally settled on triple twisted 32 gauge, dual coil, 2.4mm, 9 wraps at around .7 ohm, 70 watts. It makes you want to keep rebuilding it to try new combinations. It hits like a freight train with good flavor. It is no magma or derringer with flavor but I find it much better than the mutation for a cloud chaser.
The AFC has a three hole connected design, (you need to see the picture to understand.) I close it off to about 1.5 holes with both sides. It comes with a blue and a silver AFC ring. It looks great on any mod. I currently run it on my Sig 150.
Overall it was definitely worth the price. It is a great design, easy to build with almost any coil option.