I have mine and 5 replacement heads. I can take this one with me, slim, and the ego twist is perfect. First hit was a volcano, really tons of vapor, This ejuice hasn't come through for me yet in anything I've tried it on so I can't comment on flavor except to say no negatives. Hmm, vv . let's try 4.0 volts, monster hit, maybe a tad burnt, down to 3.7, a little flavor, enough to think , Yes,we have no bananas... 3.5 nah, 3.6 hmm, we might be on to something, tons of vapor for sure...I'll give it some time.....