Rolled with the Atlantis V1 for awhile, but got sick and tired of it leaking all the time. Recently switched over to the Subtank mini and used the rebuildable deck for my temp controlled Heartbeat. Haven't used the premade coils yet and likely won't. Love it for nickel builds, but am yet to use kanthal.
Most recently, I gave in and purchased the Herakles and man oh man have I loved it! The .6 Ohm premades are beasts that can take up to 100 watts if need be. Love it in the 38-43 watt range. Been vaping the initial coil for over a week now and still have excellent flavor/vapor production. It does run a bit hot, but the thing chucks some flavorful dripper-like clouds!