I also recommend the Smokeless Image "volts"! They work great. I started off with the manuals with the buttons... just because of things I had read on this forum. I switched to automatics for one reason only:
I like to carry them (3 at a time) in a pretty eyeglasses holder and didn't want to worry about them jostling up against each other in my purse (possibly setting off the "on" switch). With the automatics I know that there is absolutely no way they can fire unless I am taking a drag.
I now way prefer the "KGO" batteries but still also use, and really like, the volts
Just a note: automatics can turn on if you are around anything loud, like if you are at a concert or another loud situation. The vibrations trick the e-cig into thinking you are taking a drag. Just wanted to clarify. But everyone has their own opinions on what they like. That is what makes us human