Complimentary Upgrade Package Millennium, Copthorne and Kingsgate Hotels, New Zealand. Take pleasure in a complimentary upgrade when you stay with participating Millennium and Copthorne Hotels throughout New Zealand. Whether traveling for leisure or business, with lake, harbour or sea views you will be able to enjoy your surroundings from the warmth and comfort of your suite.T&C: Offer valid date: 30th Aug. 2015. Book Now.