I started with a joyetech emode with a nautilus mini tank for a couple of months.... I'm a heavy smoker as well, prolly close to a pack a day, and it just wasn't doing it for me. For example, I would keep wanting to reach for a cigarette over the vape. Yet, since I got the mech mod, I've noticed I've smoked less and less but still needing to get over that hump. I feel like I'm near the summit but falling a little short, if you catch my drift. I'm also vaping with 2.4 nicotine juice which I already know to cut that down significantly... The next time I buy juice I plan to drop it down to like 1.2 or even 0.5.. So that's why I want to build since I feel that will get me past smoking or at least cut it down significantly.