I've been pretty happy with both my starter stardust cartos. All of them except the one I tried to clean (using a dry burn method) have been pretty stellar. My battery is a 3.something pass-through that I use at home while playing video games. A buddy of mine calls it 'Turning my computer into a hooka' and I must say it is pretty awesome.
Upgraded the battery I take to work to a twist and changed the carto for a vivi nova 2.5 and am very happy with that decision, getting much better flavor out of all my juices, and since I generally vape 70/30 PG/VG, I'm in this for the taste and throat, not the vapor.
As far as quitting smoking goes, I've had half a cigarette in the month I've been vaping (about 3 days in) and that disgusting flavor from my long time brand is enough to keep me from going back. I still want a real cigarette quite often, but I just remember the one I had, and it keeps me from going back.
I will say I picked up vaping to quit, so I vape 6mg solutions MOST of the time, and then I have a 11 and 16 sitting around for those really really bad cravings. It seems to be working pretty well as I generally dont touch either more than once a day.