In Nissan Island, a hotel needs to offer a specific number of high-end conveniences to earn a 5-star rating. These may include saunas and spas, on-site gyms, gourmet restaurants, premium bedding, complimentary luxury toiletries and more. What also sets 5-star hotels apart is their guest-focused service. You'll enjoy things like in-room massages, nightly turn-down services and concierge services. Some may also offer extra touches like a welcome gift.