I just got 2 in (Black & Silver) and have to say they are very well made.

Everything is smooth threaded and works well ... draw is 100% MTL ... no lung hits here

I did have 2 small issues, first the clear glass that comes with it is simply for a different tank being a full 1mm larger on the ID than the metal or coloured glass

The other is just the care needed when trimming your coil leads ... tolerances are tight so if you don't bend to 90 or trim closer than the screw head you will get a short on the chimney section

No risk on a regulated mod but something to watch for if you use mech's

All in all a solid 8 out of 10 ... now if it lasts like a subtank then it will be a very good buy