Good review mate! I've ordered exactly the same which has landed today, don't know if you can help with some questions.
Did you charge the iMini from the start? How do you know when it needs charging?
I've screwed the cart in all the way, 5 clicks, three blue flashes which I assume is on, then toke away. I'm getting some vapour and one hit made me cough, but didn't feel overly powerful. I'm sure it's operator error or needs charging.
I've suck it on charge while I have a Volcano vape bag to try again in a hour or so