My wife and I loved the November 11th sailing on the Celebrity Solstice. There was a norovirus out break on the prior sailing and the crew handled is exceptionally well in our opinion. The ports were all unique and amazing. I have linked a video that capture our highlights.
Video summary:
https://youtu.be/N-S8Nl6BbjI
If cruising from NZ to AUS, I would pick a starboard room so you can see fiordland all day. However, if you want a PERFECT view of the Sydney Opera house, port is better.
This room was perfect distance to the elevators.
Bad pier - do not expect taxi's. We used uber. We also did a load of laundry at The Wash Line which was great
Shopping and cable car ride. Good craft beers....