Hey Rob,
I could see this being an awesome product offering with the main advantage being no stacked batteries. I was unable to get a VV Woodvil as I was out of the country when you had the last sale. I did try via a travel agents wifi but the pipe to the island is shared by all.
In any event, I decided to buy a buzz pro to get a better idea of what VV was all about. Using it for just the past couple of days I can say I love setting the hit for the juice and then having it maintain a consistent output. However, I hate that I have to manage multiple batteries. I travel a bit and already end up taking tons of batteries, tips, bottles, attys, cartos, chargers, etc. It would be really great to just have a small number of one big battery for the Woodvil/Grand platform and a few of a small battery for a Mini/Midi platform. Let the device decide what atty I brought or am able to scrounge up and adjust accordingly. This would be the ideal solution when traveling abroad as well. Swapping A1 for A2 on a daily basis to get balanced discharges and then remembering which way to start out after a charge is more than I want to do outside of my home.
Just my 2 cents and not a knock against a wonderful product offering. Actually in a round about way what I'm saying is I can see regulated REOs replacing most of my unregulated models. You've really hit it out of the park in adding VV to the game. I appreciate all of the hard work that has gone into making the REO the final destination for most seasoned vaping veterans. Brew