I quit 2 years ago and I never felt better. I know it sounds strange but I read a book and I it was easy to quit. I strongly encourage everyone to do so because they can but they dont know that.
First I want to congratulate you on your achievement not everyone could do it,
We could all encourage everyone but not everyone could do what you've done you might find it easy but others would find it to be so difficult.
I also heard that there are some cases where those who have been smoking for so long would really have a hard time stopping it,
There are some who would be sick or something I think the longer they had been smoking the harder it would be for them to stop.
I also has been smoking cigarette for about 2 or more years but I decided to quit and right after I decided I just stop on smoking it might have been easy for me but I know how hard it would be for others since I was only smoking for 2 or more years and there would be some days that I would really crave for it.