The Flash e Vapor is a great tank. Downside, it's rather big and ugly and you dont have a flexible AFC but some screws with different diameters, however you can mtl or lung hit it.
You also need some mesh for the feeder wicks, which connect the tank to the base.
You only need to build them once, though and they will last forever. Think of it as a dripper with a 5ml tank on top.
Other then that, it's superb. Easy to build, super easy to wick. Can rebuild on a full tank. Does not leak, period. Had it on a plane, upside down and on the side driving bumpy roads in summer heat. Use it for a year and it has not leaked on me once.
Fills like a ProTank, no need for needles or other crap, you can pour directly from a bottle if you like.
It's single coil and can be used at lower Watts or can push 50W+, if you so desire.
There are very good clones and glas kits available at
fastech or focalecig.