I never liked Joe and Charlie or their message. But I guess they got through to a lot of people and helped them..
Personally I like Fr. Martins stuff it sure helped me as a new comer..and knowing that..as long as it's permissable..marketing at a convention is OK with me..It adds a bit of color...at the least.
Dr. Vince a good AA friend many years used to say .."If you can stay sober in AA...
You can stay sober anywhere."