Andi - no confirmed upgrades possible at Park Hyatt Sydney - they are specifically excluded from the suite upgrade program and they don't have a Club. Your booking is not eligible for any confirmed upgrades anwyays. The vast majority of the rooms have a harbor / opera house view anyways - try to avoid rooms with a very low (less than 5 or so) or very high (in the 40s) room numbers if I recall correctly since those won't have a harbor view. It's the celebrity hotel in Sydney - when we were there Cate Blanchett was having breakfast a couple of tables over and Mark ran into Sting coming off the elevator on our floor.

Leslie - I believe that these 2 Visa upgrade certificates are the same as the 4 Diamond upgrade certificates that was introduced last year - yes they are good for up to 7 nights each.