Hi thanks for the advice! We have been doing CPT for over two years now. His doctors all felt that the vest would be more affective for my child. He had a CT scan that showed large sections of the lungs being comprimised from all the infections. I am glad to hear CPT works for you. It would be nice to just do that and not have to battle insurance, but it is the way it is. He has been doing fantastic with the vest and it is great to see him feeling well.