Quality wise, this has been the best mod I have ever had.
I have gone through Wismec Reauleuxs, about 4 of them. They all lose their paint within a fortnight. The DNA version fried on me, so did all the others. I thought going back to 2 x 18650 mods would drive me nuts, but with decent 3000+ mAh batteries this is not an issue.
Every Smok I have had, has either fried, or the battery door has failed to close, causing me to have to use rubber bands to hold it together. A few weeks back I threw away 7 mods in toto.
None of the Smok mods I have had have retained their paint work either.
This Rev-Tech Mod is the best you can ask for and with a Smok TV12 Prince (One thing they have done right) which does not leak at all, you have a perfect match.
So to sum it up, this mod is perfect, despite having a non magnetic door which I was worried about. The door on it is awesome, and saves your batteries from wear and tear which you get from having to rip them out with the little silk tape which causes damage to insulation.
Perfect mod, in all respects, best design.