Seriously, I would almost recommend the iTaste over a Vamo! For a few reasons: It does the same job, and dare I say, slightly better, as it's performing better at 8-10W for me, where the Vamo, sith the same tanks, was burning up a bit. It's a much simpler set up, in fact zero set up, just charge and go. No faffing about with charging separate batteries and different sizes. It's neater so more discreet for taking out and about. If you were to buy a Vamo, or other mod, you need to also buy some batteries and a charger. With this, you get the device, and charger for much cheaper.
Only problem I see is that it is just one battery. But it is a pass through, so you can always have it charging while at the pc/laptop. I would like the wall charger on top, I believe you get this in the full kits, but can't find it solo.
I may buy a second one at some point. Both my Vamos have been idle since buying it. Of course I'll still use them for other flavours, but for now I prefer the simple itaste V3.