Melissa, Great Rewards is an incentive program designed for SU demos as an "extra perk" so to speak...depending on your sales SU has merchandise that you can earn for free! Some is catalog items, some supply items and some other non stamping items but still useful for business...
As for the planner it is a day planner that is designed for Demos to assist in getting and staying organized, ask your deom to order it quickly for you if you think it would be useful. It is 17.95...a good deal if you are one to use a planner!