I heard David talking to Margaret Throsby one day whilst travelling in the car.  My husband was very interested because of diabetes (not serious).  I wanted to loose about 5 kgs. because I couldn't zip up my skirts and trousers.  5 kgs. has been duly lost, have thrown out all the sugar, sweet bikkies, brekky cereals and now just use glucose if a little sugar needed.  (Rarely).  We have bought two copies of all David's books and have given them away, keeping one copy of each for ourselves.  I'm giving a talk at our local "Networking" in a couple of weeks.  Will be looking for videos, You tubes etc. to download.