i live in a cruel part of the world where it reaches -30C/F. i'm dramatic, but i effing hate it with all my being. i was using ego batts with 3.5 ml vision clearomizers and a 70/30 pg/vg blend. the cold did not do well with this set-up in temperatures colder than -10C. i was unable to go from a warm environment outside to vape. the liquid would not heat up to a temperature where it would vape. i switched to cartomizers, and was able to vape in awful temperatures. i now use carto tanks and have received my first vivi nova, which i like. i don't have a lot of hope for the vivi nova, but i really do hope that my smokech tanks do well.