When I took my Provari out of the box and looked it over, I knew I had found the last mod I will ever need. Two days later I bought a mini because I like backups of everything
I had previously bought a Nautilus, which is the last
tank I will ever need. Bought a second for backup of course

. And a Nautilus Mini. Never hurts to have multiple
tanks for multiple juices.
Six weeks later and the Provaris are still the only mods I will ever need. Anything else I buy is just a hobby.
The thing about the Provari is that it does everything I need, and nothing else. I like the styling, which is understated in a way that suits my personality. The diameter is just right, easy to hold, easier than an eGo size battery, which I find somewhat awkwardly small. No extraneous metal doodads that a lot of mods have.
I have enough extension caps and tubes to use the 350, 490 and 650 cells on both (no 350 in the regular Provari of course). And a bunch of batteries.
Nothing else I need. I am truly converted!
I understand why a Provari is not for everyone. I don't get into brand wars and such. To each his own, but the Provari suits me perfectly.
I even like the name... Provari just rolls off the tongue nicely.
When I show it to a new Vaper or someone looking into
vaping I tell them that after they buy some cheap stuff to get started, THEN they should look at the Provari. Only then will they appreciate it and maybe understand why they would pay so much "for a battery holder".