I looked at these about a month ago. Depends upon your expectations for this device.
I had been using my Provari with the 18650 extension cap exclusively. Although I love it to death, it is quite hefty and not particularly pocket-friendly. I longed for a smaller, lighter, variable voltage mod that used replaceable
batteries for outside the house and perhaps stealth
vaping at work.
I looked at the eGo 14500 - too long for my tastes. I looked again at a Mini Provari - I couldn't justify another $200 + batteries at that point in time...maybe in April for my 1 year vape anniversary.
I looked at the Robust. Nice size, not too long, looked light in the hand, probably pocket-friendly, used replaceable rechargeable batteries, decent price. Then I read the
reviews:
http://www.e-cigarette-forum.com/forum/variable-voltage-apv-discussion/353226-another-14500-vv.html
I came to the conclusion that the tiny 14500 IMR battery just isn't powerful enough to give variable voltage a fair shake in this device. If you really like the form factor, don't plan to use low resistance coils or use voltages over 5v, and don't mind the short battery time (3-4 hours?) this might be a nice little APV for your purposes.
I went with a Smoktech V.V. Gripper instead. Just $50. It fit all of my requirements, and the fact that it uses the same 18650 imr battery as the extended Provari is a big plus factor to me. It fires hotter than the voltage that I set, but I expected that before I purchased it and I set my voltage accordingly to compensate. I use it exclusively now for work and when out-and-about. It's about the size of a small pack of cigs and fits easily in a shirt pocket.
Good luck with your search.
