Wholesale showrooms occupy 50% of the usable floor space, and the Sultan of Brunei once spent $1.6 million at the Mart to furnish his entire palace, claiming the location was the only place where the task could be completed in one week. Select showrooms are open only to wholesalers, with others accessible to the general public. Unlike stores with traditional shelf and rack displays, entire usable rooms are created, providing consumers an opportunity to compare form and function between applications and manufacturers. A portion of the stores offer items for purchase singly or as a collection, while others offer design services, preservation, renovation, or installation. In addition to being a resource for architects and decorators, the Mart also has featured award-winning designs as selected by the American Institute of Architects. Catering to suppliers, on-site firms specialize in providing professional services for market research projects.