I like them because I can get C02 oil (glycerin) at the dispensary and easily fill the cartridges and get great flavor.
http://www.openvape.com/shop/featurend-product/o-penvape-battery.html
I'm planning on just buying a bunch on ebay since the shops overprice them where I am. Should I be using a new cartridge for every .5-1g or reusing the ones I already have?
Lately I've been feeling it's been taking longer to heat up. This could be because it's cold outside right now, but I keep it in my pocket while it's heating up.
A lot of times while it's heating up as of late I have noticed the color changing from purple to orange. Maybe it's going into...