I'm pretty upset that I literally only got maybe 5 hits off of it before it started tasting like burnt wood and wouldn't work anymore. I tried charging it over night and still does not work. I feel like I got sold a used one because the cartridge looked empty when I first got it. I don't know if I got a bad one. It seems like I'm not the only one according to these reviews. This is a shame because I love this company and have purchased many products from them.