Been using NPro/njoy/Total E-Cigs for awhile after discovering them at a local 7-11. Used to roll my own ciggies (the legal type). Much cheaper than buying a carton of Marlboro's. Finally ditched them 3 weeks ago, and went total e-cig. Been looking around for a less expensive way of enjoying my e-cig's and stumbled upon this forum. I learned ALOT today, and now in the process hopefully saving some cash by refilling. Thanks again!!! Not too thrilled with these Total cartomizers. Lately the quality hasn't been too good. So far out of the last 10 or so cart's half have either been dud's, or was lucky to last several puff's before quitting on me. So I've been surfing the Net looking for alternatives. Now I have to get the XYL to follow suit, though she recently just starting rolling her own since I gave her all my stuff.