I've got the 510 and what I love is the intense throat it gives, especially with a high nic like 24 or 36, so I can go hours without it, and then drag if I want to and I'm satisfied quickly because of that throat hit that is more than analogs, it is like smoking a whole cig within 3 hits, so awesome. So to me, the e-cig is as healthy as it possibly could be and satisfying to the fullest. SCREW the FDA.
Oh, and when drinking, the E-cig is great with high nic, that's the only time I will vape a good amount among regular smokers, funny thing is that mine is better all around and they have no clue... some people get upset, I've even had people try to start a fight over it. And some can't handle me talking about it, they get all ...... like I'm trying to convert them, yet I'm simply trying to explain it to them and tell them where they can find info on it. Whatever...