I’m afraid I’ll gain weight if I stop smoking
Every smoker has experienced thoughts like this before using this method to become a non-smoker; these fears are not unique to you. You have no cause to worry.
Each of these fears is specifically discussed and tackled in the book and on the audio component. Nothing will be a barrier to your goal of becoming a non-smoker.
Any fear that you have about quitting seems inconsequential compared to the true fear of potentially contracting lung cancer or heart disease for someone who remained a smoker.