I'm almost at 4 months (Sept 20), and I have to say that at right around the 3 month point, I could have almost EATEN a carton of cigarettes!! The initial quitting was almost effortless. And for the next 2.5 months or so, it was really easy. Then I started getting these cravings.......not really nic fits, but .......something (alkaloids, or whatever, I guess). There was one day in particular that was really bad, but it finally passed.
Long story short, it took about a week or 2 past 3 months for me to be fully free of the cigarette cravings. Honestly, I can't even remember why I smoked for so long!