You'll probably have to do a little investigative work to see if the Gustino accepts the dining certificates with points, but the certificate details can be seen at: http://www.marriott.com/rewards/usepoints/inhotelextras.mi Under dining certificates, click 'View' under view details and order reward. On the page that appears there is a place to click 'Participating Locations'. A PDF file will come up that lists the hotels that accept the dining certificate but doesn't list the specific restaurants at each location. A quick call or e-mail to Marriott Customer service will probably get the restaurant participation question answered or they can look into it for you. Hope this helps and have a great trip!