I have both an MVP and two Provari's. Both are great devices for what they offer, however I prefer the Provari hands down.
I prefer using a tube shaped device over a box shaped one, its just more comfortable to use and carry about, like in a pocket.
I like knowing that I get a great 1 year warranty, and in the unlikely event that my Provari needs some repair after warranty, I know that Provape will repair it for reasonable cost and have it returned to me in a weeks time. I expect to be using my Provari for many, many years.
Should my MVP need repair, or when the battery eventially dies, it becomes an expensive paperweight. Are there better mods than a Provari out there? Probably. Is a Provari worth the money? It is to me, but that's my experience. It fits my needs perfectly and I liked my first well enough to buy another.
Why Provari? My blog on the Provari