The MVP2 is great, but as long as innokin makes the VV3 I will use them more then my MVP. I just love the hand feel of the VV3. maybe it reminds me of holding a cigarette, but the light feel with my Mini Protank2's is perfect for me. At home I'm good with the MVP and I never think of it going dead on me. Being a throw away device means nothing to me, as it's half the cost of a carton of cigarettes and so far mine have lasted for months now and still no loss in charging power.
