ADDENDUM: I neglected to mention the importance of manual switch placement (and "feel") in your selection of a big boy.
For *me* being able to use my thumb on a large button (i.e., the Prodigy) is perfect. Some of the others seem to require using your pinky finger (or perhaps your middle finger if holding the device in a different way) when pressing the button at the end of the device.
I am now going to find out more about that Mahmba. Automatic juice injection is the next major advancement needed for the e-cig (other than perhaps a more reliable, longer-lasting atty).
Honestly? I thought the pinky button would bug the crap out of me, but it feels very natural now. I have my own little way of doing it. It's a non-thought thing now when I'm using the AdapteveR.
And autojuice I've developed an opinion on after using a dual 801 mod: It's overkill, at least for me. My unit of time is one uninterrupted movie. I can fill two 801 carts for roughly 2ml of juice, and make it through an entire movie without having to screw with anything. That's why my current test design has four 510 atty's with a 10440 for each. About 2ml of liquid total in the carts. When I nail the custom mouthpiece, I think I might have an industry first design that's literally one piece of metal about the size of a zippo lighter.