We sailed on the Victoria Sophia as part of a Magic of the Yangtze trip and sailed down the river from Shanghai to Chongqing staying on the boat for 8 days. A number of tours off the boat was also included in the packaged holiday cost at the various places it stopped including Nanjing, Wuhan and the three Gorges.
So first of all the boat which was (according to them) 5 star but I'd put it ...