Do not buy their products. They will not provide any refunds if the package is opened. How do you know if something works unless you try it.
The vape pen I purchased did not work well. Keeps plugging after the first draw. I worked with their services representative and tried all the suggested fixes, none made any difference. One suggestion was to use a toothpick to make a hole in the center of the material to help with the draw. Total rip-off and I'm out $100.