Which batteries do you have that you plan on using and how many? I uses a Reo mini which runs on 14500, with proper quality batteries - I easily carry and drain 3-4 batteries per day. I love my Reo, so dont take it that way - but be prepared that will last you about 4 hours on 1 battery. You will need at least 3 batteries if you plan on using this as an all day device, that way you can have 1 in the device, 1 charging and 1 resting after charge since they drain pretty fast.
Honestly, for the money the itaste vv v3 has more mah, more features, and more simplicity for less money. But its about what *you* like. There is absolutely nothing wrong with the above device. If you have the right batteries and enough of them and dont mind swapping a few times per day you should be happy with it as long as it isnt cheaply made.
In the end its only about what
you want!
