I have done both vest and manual CPT. My parents used to whale the living tar outta me twice a day when I was healthy and 4-5 times a day when sick. It was highly effective, but you have to actually DO it, have someone who is skilled and very strong, and rely on their schedule. For many, the vest is more convienent.
MerryMary- I no longer do the vest either, after many incidences of broken ribs that seemed connected to when I was doing the vest VS CPT. I too, would be VERY interested in how many people have had pain issues from the vest. Now I nebulize and run simultaneously, and that seems to be the best.