okay,just checked out the mega.looks like a larger cart.i burn around 2-1/2 packs a day.not a real problem to carry the juice with me or, fill my carts and carry them[with caps on and all.used to carrying packs around after all and like the feel of something in my pocket].believe i'll go with the tank system starter.would like to upgrade to the bigger batt.s though.don't know if i can though.haven't talked to the website yet about it.i must say ,you folks have been a real help in picking out the way i'm getting away from the cigs.don't believe i can quit completely,but this seems like an excellent way to get my nicotine ,but stay away from the smoke,tar,and bad smell.not real worried about offending other people since the w.h.o. came out with thier second study several years ago and found no harmfull effects from second hand smoke.the anti smoking nazis choose to ignore that one ,yet hail and huzzah to the first one that said otherwise.same group,1st and 2nd study.they[smoking nazis]simply don't like the smell or smoke and use any excuse to quash it.if they're nice and ask,sure i'll put it out.no,,,,IT'S STOP STOP STOP 1000 feet from my house,store,building,car or air i might possibly breathe in 5 minutes or an hour or two days from today!!!sorry,got off on a liitle bit of a rant there.anyway,i appreciate the advice.