Thought of two more reasons...
5) Many people really appreciate them, and not just newbies getting their hands on a long lasting battery for the first time.
6) Heck... Isaac just got one!
Then of course the reasons not to get one:
* I don't really need another ecig battery given 2 MODs and 4 rechargeable 16340s and a handful of underutilized 40x batts already.
* Using as a LR atty breakin device will probably shorten their lifespan considerably, and these are expensive as batteries go.
VM, based on your vaping preferences, I think you would be more than happy with the Ego and that's the one I suggest you to get based on what you are looking for
Seems like Tornado is exactly the same thing as an eGo (both Joye), while the Riva is made by EastMall, and the Maxx by Smoores (maybe). Are there any meaningful differences between the eGo, Riva, and Maxx (aka T-Rex)?
Just did a quick search for differences.
eGo - 650 mah, hard plastic btn, regulated 3.2v
Riva - 750 mah, soft rubber btn, regulated 3.2v
Maxx- 650 mah, steel btn, unregulated 3.7v
There are 900 mah "mega" eGo batts too. And there's something about the T-rex being extinct? The eGo's button looks slightly recessed where the Riva is not.
Its a coin toss between the eGo and the Riva for a potential breakin device, the larger capacity could win the day. If I didn't have full powered mods, I'd be more tempted by the full powered Maxx or Hello devices.
I'll have to go thru breaking in more LR attys to know whether or not its worth getting a device for the primary purpose of breaking them in. They do look very sleek with the cone in place.