So don't be surprised if the folks at the mall start laughing at the sight of a screwdriver. They probably have a better idea of what is marketable than you do and the SD might be a tremendous PV but it is very far off from an e-cig form factor and equally as far off from being a marketable product that a casual shopper would buy in a mall.
i agree with you about the SD thing, that is for people who are really craving a product like that.
Until you become educated yourselves, and then you realize that you want a product the really works. THen you step up and get a mod, whether it is an SD, LV, GG or whatever. I could give 2 *hits about what is marketable. I want a product that works and operates for the least amount of ongoing costs. That is one of the devices I mentioned. If you feel the need to justify to yourself why you overpaid for a product I could get for $20, fine.....but at least be honest about it.