In Tam Ngãi, a hotel must provide a certain amount of upscale features to earn a 5-star rating. These can include on-site gyms, spas and saunas, gourmet restaurants, premium bedding, luxury toiletries and more. What also sets 5-star hotels apart is their guest-centric service. You'll enjoy things like concierge services, in-room massages and nightly turn-down services. Some may even offer additional touches like a welcome gift.