“Good looking unit at a good price but it has some serious issues. Biggest issue is that there is no way for air to get to the cartridge, the "looking window" is a good idea but it completely encapsulates the cartridge in the body of the mod. I have tried generic cell carts, sprk carts and a few others. With all carts there is no airflow. Second the body is plastic, and the last issue I had was when I press the button to activate the device the OLED screen moved inside of the unit. Its like it wasn't mounted properly. If I had conducted more research I wouldn't have bought it”