Indeed, the my Chinese mods did much more. My first Vamo lasted about a month, in that time I learned how to pry the firing pin up with my new set of dental picks every time when switching toppers. I watched some videos, went to hardware store and bought orings, which seemed to have fixed the pin problem. It rolled off of a table, onto a cork floor and the body became "wobbly", soon thereafter, it stopped working altogether.
My second Vamo took a fall off of the same table, appeared to still work, but started burning atomizers (power regulator failed).
With both Vamos, I could tell when the battery was getting below the 3.7V level. With both V2 and V3 Vamos there was a significant degradation in the vapor quality with a low battery.
Bear in mind that i have an itaste MVP and itaste VV\VW, and I love both, in fact it was switching between the MVP and the Vamos that led me to question the 33Hz electronics in the cheapo Chinese products.
I got my Provari 3 weeks ago. The thing is consistent, and lovely as hell.
The difference between the Vamo (and other cheap mods) and the Provari is like comparing a Harbor Freight voltmeter to a Fluke. Your inability to tell the difference doesn't imply that there is no difference.
I will be buying a mini here very soon, right after I buy my 1st Reo.
Any baby-vapers who have that sneaking suspicion that they should just get the Provari now. Well, I wish I had. I would have saved some $$.