The only thing I'd add to all this is that photos can be deceiving when you're looking at e-cigs. I recently got both a ProVari and a GLV2 Mini - they're both custom built units, one variable voltage, so I can dial the power up or down to get more heat and vapor, or less, the other fixed voltage, but more than an eGo. From the pictures I imagined something about the size of a pipe bomb that I would never be able to get past airport security. When I got them, I was surprised to find how small and light they are. The GLV2 Mini went to my sister. It looks and feels nothing like a cigarette, and she likes that. I ordered it in a deep blue/purple color, she carries it with her everywhere, and she can go two days on a single charge. It's about the size of a Bic lighter. My sister is a 5'2" blond who wears a size 2, and she couldn't be happier with it. My ProVari is a little longer, but no bigger around. It's a more industrial look (machined stainless steel) but also comparatively light and easy to carry. It has more features, but she wants simple and fun and I want gadgets and fun. With all the choices out there, we both win.