Im not a fan of the mega, and that is why I switched to the 3.5
tank 
I LOVE IT, cuz I dont have to fill the wow or cc's

and with the 3.5 it actually lasts me about 2 days or if I vape more, a day and a half or a day. They also (V4L) have the 6ml that a lot of people use too on the ego's

You should come join our forums there
There is some information in the forums, but here are some links to help you see the aspects of the Ego, and all the techno info

but it is awesome to have that shut off feature so it doesnt accidently get a charge. There is an
808 Ego section but if you like that Mega Carto look ..whatever works right