I did find, however, with the Mega Cartos that the instructions issued with them weren't accurate and caused me to get a bad burnt taste. The instructions said not to put more than 0.6 ml of juice in them. Volcano's customer service recommend to put about 1.6 ml. Since making the adjustment I haven't really had a problem with burnt taste. Also, I puff the cartos a little faster than the regular cartridges and it helps to keep it from getting too hot and burning the vapor.
Still loving the Inferno and the mega cartos are amazing. I take either battery off of the charger in the morning, put the carto on it, and don't have to recharge or refill until late that night or the next morning. That's with chain vaping too. The thing is in my hand most of the day. I'm so happy that I skipped over the Volcano Magma or any other 510's and went straight to the industrial-sized Inferno.
My wife thinks that I vape more than I ever used to smoke. I've explained to her that smoking never tasted so good and not having to go outside to vape also helps. It also helps that I can vape without hearing complaints about how I stink of smoke. (Now, I just stink for other reasons.) Overall, she's really impressed how easy it has been to give up cigarettes and she's even been telling her coworkers about ecigs.