I've had the Standard Volt Kit and one extra loaner/backup battery, all 78mm, and have been Analog-Free all 19 days after 38 years of smoking. I've loaned out the battery and some carts 4 times, two have already made Starter kit purchases and another will shortly.
Three other co-workers have tried a few draws off mine, with all
three placing orders for kits and a fourth going for the New X2. The SI Volt System really does all the selling once people see and try it for themselves, the Super-Fast Delivery & Great Customer Service is just an added bonus.
I plan on purchasing a second X2, the 650 I just received the 900, and sending my 78's to my sister who currently uses another brand of e-cig.
This has been the Best Investment I've made in the past 7 years, no cravings for the Analogs at all.