I started
vaping a long time ago, (801s, 901s, all
juice was chinese, etc) but it never quite took. My problem, as a 30+ year marlboro light smoker, was I assumed I needed a tobacco flavor, and none of the juices worked. A few months ago I started getting the new equipment, 808D-1 batteries, and mostly 510 clearos or tankomizers with adapters as they seemed to have more stuff (before I found SI). I still went back to analogs.
I finally decided the only way to make the switch was was to refuse to buy cigs and make this work. I've found that now I like juices that are fruity, or have a coffee/rum flavor, or a mix of vanilla/bourbon. I'm not smoking anymore. Vape on.
To the OP, 1 ml seems to be 9-12 analog cigs to me. I think that's what most cartos hold.