This is a solid product. After two weeks of using it, it's given no problems, or indications that it will. It's easy to setup, and easy to use. One of the reasons I bought this is because I smoke like a champ, a pack to two packs a day, of american spirits which one pack of them equals two regular packs. The first day I started using this with a SMOK TFV8 tank and I smoked 3 cigarettes. I'm down to about two packs a week, maybe less. In fact about the only time I really smoke is when I'm playing poker.... because everyone else around me is smoking. I figure in two more weeks I'll be done with smokes entirely. Well worth the money.