For every 5 rooms that u book you will get the 6 room for free ( kind of ,I will explain). You get the lowest amount for all your guest booking . Eg ,if some are up grading and some are not you get the lowest on of the two. If some are staying for 10 days and others for 7 , once again you will get the lowest of the two. We had 18 rooms booked and got 3 free . The total in dollars that you can allocate to whom ever was 2997.00 Hope this helps you out.