Currently I use DSE 901 as my primary e-cig. I was thinking about moving to e-cigar (not on the road, but home, office etc). However, I heard a couple of problems with e-cigar: 1) Dusty's e-cig review and a few people here too said that vapor production drops considerably in a day or two. In other words, you get a kit, it generates a lot of vapor. but a day or two, even with full cart and fully charged battery, the amount of vapor drops quite bit (below DSE901 or even Npro). Anyone have this experience? 2) How long does the atomizer/inhaler tube last? Is it comparable to DSE 901? Costs twice as much. Any problems that I should be aware of? Thank you.