As far as rebuildable tank attys go, aqua owners and kf owners, and genny owners will all talk you that the fogger v4 is by far superior in vape quality, density and flavor. Check out the fogger v4 threads here and you'll see, the fogger v4 is king, both @0.5 0hm and 1.4ohm and everywhere in the middle on Mechanicals and regulated devices.