most trouble free e cig

I have seen the smoking everywhere ecig. what exactly is the trouble you have been having? I have dse901. the mini liberation from smoking liberation. It has been working pretty well for me but i was stupid and didn't buy the nicotine liquid but i think i actually needed it. As far as everything with the ecig its self. One battery seems to work a little better then the other and the atomizer seems to get really hot sometimes because of excessive use so you can kinda taste it burning at some times. But it performs like a champ from what i can tell so far. I have had it for like a week

It is the pen type smokingeverywhere cig.
After a 8 hour charge, starting blinking, new cartridge works for 20 mins off and on and then no smoke.
spoke with a rep at the Mall said I was draging on them to hard, should be slow and steady.
Guess I just have to practice or go back to the bad cigs
Pamela