I personally like the CE2/tank mods ten times better than the tornado tanks. I found the tornado really didn't hold that much juice(at least for my consumption levels) and it was still prone to flood and be finicky the same as a regular atty. MapTank or $3 tank will hold most of my juice for a whole day and the CE2's are easy to replace and at around $2 each or less vs the $16 for one new tornado atty it's way cheaper in the long run too. The tornado tank would be handy for someone stepping up to an Ego from a standard 510 battery setup w/cartridges, but I already had better options when they came out, so I didn't see much benefit and the cost was still the final decision for me. I also think they are particularly tedious to try and blow out/dry burn/clean as well.