We were cruising with Carnival aboard Carnival Legend from Sydney to Tasmania and back. In general, it was a great experience. As you can read in my TripAdvisor reviews (https://www.tripadvisor.com.au/members/AndreyV277#CITY_TILES) I can be very critical but my first ever cruise was a great experience.
As always in my reviews (like Tripadvisor) I concentrate on:
PROS
Great room with a huge window
I love Sydney
Hobart looks, feels and smells like a mix of Northern England and Scandinavia