Hi Bolo, I've been using the Vgo2 vv for about 6 months now with the Nova tank, I have 2 tanks one of which is the larger 3ml. That generally lasts me all day at work. The kit is good but the 2 400mah batteries it comes with only last around 4 hours so if you don't have the ability to charge at work I'd recommend getting a 600 or 900mah battery too, the 600mah will last me a full 10 hour shift at work. The replaceable heads usually last me around 2 weeks and that's generally filling each tank up once a day, (little tip, don't get the black batteries as they chip easily) Great piece of kit. I also started with V1P pcc kit which I also used for about 6 months.