I vape all day at work, and sometimes at home, on my 5v passthroughs using very low nicotine mixes. It's great. When I need to be mobile around the house I use a ZRR/3.0ohm carto combo. Had to vape zero nic for a few days or so after falling ill. I've since cut my nic levels way down lately (had some craving for a little while but got over them). I'm actually not missing the former levels much...if any. My current nicotine stock just grew considerably....LOL