“Great product, been using for years. The pen/battery units last quite long if your somewhat careful- also very easy to fix (the cartridges too, as some come defective- maybe 1 out of every 10-15 you try don't work). One of the best e cig's out there. Decent customer service too/VUSE. BPN is great site. Always on point, always fast shipping, always pleased. I've read some negative reviews, however I wouldn't pay too much attention to those.”