The team gave it to me, will have been on it 16 weeks by the time I have op. I was 35stone to begin and they wanted me to lose 2 1/2 stone before the op. I guess they thought it would take me longer than it did! It has really prepared me for life after surgery though, and even when I have been stressed I haven't turned to food for comfort, so I think it has also put my head in the right place too!