I quit January of 2015. I had been cutting back for a few months - first stopped smoking in my car, then on my breaks at work, etc. After a while a day came where I decided firmly enough I wanted to be done and I started taking some leftover Chantix from a previous attempt (NOT for everyone due to possible side effects), and it finally stuck. Sense of smell and taste improved greatly - I found I do not like olive oil.
Oddly, I still kind of like the smell of smoke (just a whiff here and there on the breeze), but I can't stand the way people smell when they've been smoking.