I found keeping the atomizers dedicated to one set of flavors (fruit in one and sweet/coffee in the other), made mine last. I got a month+ out of my first two atomizers and one still works fine. When I started to get a burnt taste, I blew it out through the atomizer top through the battery connection, then soaked it in alcohol/water. Let it sit overnight and the next day it was fine.
The vv Joyetech 650mAh batteries that came with it are awesome, love them. I like them so much in fact, I see no reason to buy any mod beyond the itaste mvp for now. I have one 1100mAh vv battery, three 650mAh vv, and one 350mAh.
The eGo-T tanks are a great vape but I just couldn't take the leaking. I think the flavor and cape are good though, just think the EVOD BCC tanks on top of the Joyetech batteries is a slightly better set-up for those coming from cig-a-likes.