In Smartt, a hotel needs to offer a specific number of high-end conveniences to be designated 5 stars. These can include on-site gyms, spas and saunas, gourmet restaurants, complimentary luxury toiletries, premium bedding and more. What also sets 5-star hotels apart is their exceptional service. You can look forward to things like concierge services, nightly turn-down services and in-room massage. Some may even offer thoughtful touches such as a welcome gift.