I've HAD one, and still have one sorta. It was my first RBA/RDA and before I got round to trying it in genny mode I managed to crack the glass tank. It's now my main and still my favourite dripper compared to the IGO-W.
It's 22mm in diameter so fits nicely on all my big devices, running a 1.2 ohm micro coil on it with the airhole drilled to 3mm, it HURLS and I mean HURLS the vapor. Compared to my IGO-W with two 1.8mm drilled out holes running a dual micro coil at 1.3 ohms. I still get more taste on it too compared to my igo I find.
Overall I HIGHLY reccomend getting one, if even for just using it in RDA mode, with the airhole redrilled it's a beast.