Mantra Sierra Grand - a new Trust Property. Stella Hospitality Group's latest addition to the Mantra brand, opens on the Gold Coast.     The Quarantine Station, Sydney's most unique Tourist Destination selects essense as its systems provider.     Stella Hospitality Group goes live with the SIHOT Central Reservations System.     Deepwater Baths & Spa installs the 'Reservation Assistant' Spa Management System.