So I bit the $180 bullet and got myself the Vapor Shark DNA. I have had it for a few days and I am very happy I went with it. I too was worried about the 1200mah but then thought about it, with my car charger, charger at work and at home I wasnt that worried about running out of juice. If you are still worried about running out of battery, head over to amazon and grab a portable battery charger that holds 3000mah and is just a bit bigger than a 18650 for $19.99, or some variant of that.
As for the device, build quality is awesome and it feels like I am holding a solid piece of aluminum. The buttons feel supper clicky and the screen is well protected and aligned. Form factor is really nice and fits well with my thumb or index finger falling right on the fire button. My only grip would be the + and buttons sticking out a bit too far so I sometimes change the wattage in my pocket, not a huge deal. Going from a Vamo or MVP in my pocket to this little guy is great, even wearing slacks I forget its there.
To address the battery changing point, it is hard wired to the device via solder but 2 screws give you full access to it and plenty of room to remove them and re solder new ones if needed later. If you are not feeling up to doing it on your own you can send it back to them and have it done for $25ish.
Overall Im very happy I decided to go with this device instead of the Pro Vari and not having to deal with worrying about charging 18650, 18350s over night and having spares in my pockets, did I charge them did I not and blah blah blah.
Moral of the story, Pony up and buy it, its sexy!
Example of the Batt charger
Amazon.com: Anker® Astro Mini 3000mAh Portable Lipstick-Sized External Battery Backup Charger - Blue: Cell Phones & Accessories