We sailed on the CB in 2018 and had lousy AC in our cabin, It took them 4 days of trying to fix the situation and then finally changed our cabin.
The buffet food was terrible so we resorted to eating in the DR whenever it was open, which was consistently good.
After sailing on Royal class ships since then I would never return to the CB at any price. Why would anyone consider that ship when there are much better alternatives to choose from?
I suppose if it stopped ports you just had to see then it might be a possibility but just be prepared to adjust your expectations a bit.
It's not the greatest of ships compared to the rest of the fleet.