In Ona, a hotel needs to provide a specific amount of high-end conveniences to be designated 5 stars. These can include on-site gyms, spas and saunas, gourmet restaurants, luxury toiletries, premium bedding and more. What also sets 5-star hotels apart is their guest-focused service. You can expect things like in-room massages, nightly turn-down services and concierge services. Some may even offer thoughtful touches such as welcome gifts.