Premier Sotheby’s International Realty requires a high standard for the rental properties represented. The company has initiated a ‘precious metals’ rating system similar to that of hotels. The system is a standardized assessment of the quality of a property’s interior. Ratings are intended to help guests select a rental property that meets their personal expectations. The ratings range from Platinum to Bronze, with the Platinum rating being the most luxurious and Bronze being simple yet perfectly functional.