I've used mine everyday since I bought it.
Dual battery, variable voltage, milled from a block of steel, simple, sturdy and cheap. No screen, no nonsense. I don't need to be reminded what the resistance is, or the number of puffs, or what time it is, or what the wattage is. I dial in a sweet spot and that's it no fiddling about.
I would like it if the internals were user accessible, but it appears to be a sealed unit.
I use mine with a TFV8 at about 67 watts. Even though it does both series and parallel unregulated, I only use it in regulated voltage mode.
The clear coat is starting to come off, but despite being used constantly and getting dropped multiple times it's still in perfect working order.
