L........g

I've two cartridges stop working, which sucked! I had to empty the cartridge and just top my bong hits with the oil. Which was a waste in a way. They say the cartridges are compatible with any pen. They are not. They burn out, or something. I've had no trouble with using the same brand battery. It works awesome though. Very discreet. Perfect for those long waits at the bus stops.

Very uplifting. I don't burn out fast. And the flower taste great out of a bong.

Good customer service! Very helpful!