I have and mostly use my MVP 2.0
Very long lasting battery
Output voltages are only 0.01-0.02v lower than the setting so well within spec
Only thing I don't like is the button placement
I wish they had put it on the skinny side of the box
I also own a kamry k100, a vision spinner 1100mah, and a smok tech ace
The ace is nice and my freedom smokes has them for $39 but it is pulse width modulation
So unless you are heavy into modding it works fine.
The wattage mode is a much cleaner Vape than the voltage setting also for some reason.
Over all I bounce back and forth from my MVP 2.0 and the Ace with a side of spinner
As for tanks...
The only tanks I use now are the Aspire BDC tanks
Best flavor and vapor this side of rebuildables
The wick coil design is something kanger and innoking are now using in their newest tanks but aspire was first
As far as point of sale I use my freedom smokes mostly but also discoutvapor and Hoosier ecigs is a place I use sometimes
101vape is nice but they really only sell a few products but their innokin prices are usually hard to beat for a company shipping from the USA