I'm a fan of MOSFET mods. I have a Kirin and a Cthulu tube and love them both.
While this mod is well built, there are some disappointments. Firstly the curvy body and fancy switch arrangement makes the body far bigger than any other MOSFET. It just feels bulky and by the time you fit a tank you might as well have a regulated mod in your hand.
The obvious answer is to use the 18350 mode but, despite the pictures and description, the 18350 case is NOT INCLUDED. It is a separate (very pricey) purchase...if you can find one for sale. Which I can't. Nor can I find any of the other accessories they half promised.
Finally, I put the Pioneer tank on mine thinking, as it was the obvious pairing, they might match. But they don't, not even slightly. It looks so out of place it might as well have come from a different manufacturer.
Very disappointed. Glad it was on offer because it's going straight on Facebook.