m not quite sure what your friend and her husband used, but if it was
chantix/champix, then the success rate is 44%. I used
Chantix to quit and it really worked great. Saying that, there are so many people who have experienced side effects, some severe, so make sure you do your homework on it.
Most people that you tell truly want to see you succeed. The one who told you would not be able to succeed is probably bringing her own experience into your conversation.