I have two mini volts the white and red and I LOVE THEM. I do not sub ohm and with my Aspire Triton mini tanks with my nautilus 1.6 coils I only have to charge these mods maybe once every three days or so. I bought the red one as a kit with the mini volt tank, but I do not care for the tank. Too airy for me as I like the MTL and tighter draw. But the couple of days I tried the tank it did not leak at all. The battery definitely lasts a decent amount of time with the tanks/coils that I use. I had to get used to the automatic shut off after 10 minutes as my other main mods are the Isticks which don't do that. But, I eventually got used to this feature. All in all I am quite pleased with them and haven't had any major problems with mine.