In Kierinki, a hotel must offer a specific amount of high-end amenities to earn 5 stars. These can include on-site gyms, saunas and spas, gourmet restaurants, luxury bathroom products, premium bedding and more. What also sets 5-star hotels apart is their superior service. You can look forward to things like nightly turn-down services, concierge services and in-room massages. Some may even offer special touches like welcome gifts.