This kit came with an adjustable voltage battery that lasts me the whole day before having to recharge, and an adjustable airflow dual coil pyrex glass clearomizer that I refill with e-juice about 2-3 times a day.
It's heavy and bigger than other e-cigs I've tried, about the size of a cigar, and has a sleek gadget look to it. I've use it for 2 months now and haven't had to change the coil in the clearomizer/tank, my hubby on the other hand had to change his coz he inhaled forgetting to refill his tank and had to use the replacement. Also, the coil that's installed when you get it seems to be better than the replacements included.
Instead of smoking there's vaping, it's saved me money, it's convenient, keeps me smelling nice, and possibly saved my life. (FYI e-juice is just Propylene Glycol or Vegetable Glycerin based liquid, mixed with small amounts of nicotine and food grade flavoring).