I can only speak for my own experience, which is, I feel so much better. I no longer have copd, I can breathe, I no longer wheeze all the time, I no longer stink, my teeth are cleaner and my gums are healthier and my bones will now heal. I have had two broken ankles inside of a year and have been told by my docs that I have not been healing like others because of smoking and I really believe them, I take months and months longer to heal than people I know who have broken bones as well. For instance, I broke my wrist about two years ago an I d it took me six months longer to heal than my sister in law who broke the same bone several months before I broke mine. I am sure that as time goes on I will discover more wonderful things that are better, but so far my pluses are pretty substantial.