Flawless guest service is the hallmark of every 5-star hotel in Mars. From the moment you enter the lobby, staff cater to your every need, whether recommending activities or providing in-room beauty treatments. Also, hotels have to offer upscale conveniences to obtain a 5-star rating. These can include luxury baths, saunas or spas, pools, gourmet kitchens and knowledgeable concierge.