I don't know anyone who does not have doubts. In the end for me, the part the put me over the edge was if I don't change what I am doing to lose weight I can't expect different results. This program takes conviction and you need to be motivated to follow the guidelines, do the exercise and keep focused during the Bandster Hell phase before you hit restriction. In the end it was not easy, but it was the best thing I ever did for myself.