In Onan, a hotel needs to provide a specific amount of upscale features to be rated 5 stars. These may include gourmet restaurants, saunas and spas, on-site gyms, premium bedding, luxury bathroom products and more. What also sets 5-star hotels apart is their extraordinary standard of service. You'll enjoy things like concierge services, nightly turn-down services and in-room massage. Some may even offer special touches such as a welcome gift.