You can cover one of the two intake holes to fix that without having to change how much you pack.
Flavor is great up until about 4.5, where it starts getting a bit of a singed (or burnt popcorn) taste.
I've received two like that, the smell goes away and I think it's just from the packaging...
I think this can be stealthier than the puffit too- add one of these on top of it when it's not in use:
EDIT: Get one that runs on 18650s and make an adapter! :D
It pretty much is, from what Tim's said so far, it sounds like it's made of zirconium ceramic (exceptionally strong)
EDIT: "Comprised of a stabilized structural ceramic that is as clean as glass, as strong as steel, and nearly as hard as a diamond."
Google "stabilized structural ceramic" and...