In Sert, a hotel needs to offer a specific amount of top-notch amenities to earn 5 stars. These may include on-site gyms, gourmet restaurants, saunas and spas, complimentary luxury toiletries, premium bedding and more. What also sets 5-star hotels apart is their guest-centric service. You can look forward to things like concierge services, nightly turn-down services and in-room massage. Some may also offer thoughtful touches such as a welcome gift.