I went on the Christmas Day lunch cruise, on the Ocean deck, which was the lowest cost area. The cruise left from Kings Wharf on Darling Harbour, and I got several messages beforehand re this location, and the Covid safe measures. At the wharf, there were long queues to board, and it wasn't clear which queue to join. I hung back till the crowd lessened and got on without much waiting, but some people had a bad time, getting to the head of a queue, then being told they were in the wrong queue and being sent to the back of another long line. The advertised 'jazz band' was a duo of guitar and sax, who were competent, and entertained the waiting crowd with Christmas tunes.
On board, there was good social distancing and comfortable chairs for the sit down meal. The wines (included) were all Tyrells, and reasonable quality, and the top ups were generous. The food was disappointing. First course was a few slices of processed ham and turkey, just dumped on a plate with no attempt at presentation.
Main course was a "Seafood Buffet" presented on a three tier server. The quality was good but the servings were totally inadequate. My table of four got a top layer consisting of five oysters and four large prawns, plus a tiny plate of salad with a few strips of calamari in it. The middle tier had only small cups of condiments. The bottom tier had a basket of hot chips. There was supposed to be smoked salmon, but we didn't get any. Dessert was some small pieces cut off a plum pudding and individual little pavlovas - one for each person. No coffee or tea included in the price. Don't go for the food.
The cruise round the harbour was lovely, though a bit repetitive over three hours. The windows are large and everyone gets a good view. The staff were uniformly excellent.