This was our first cruise, and was a disappointment for several reasons.
When we booked, we were sold the "newest" ship in the fleet, we later discovered it had undergone a 9 week refurbishment. My local pub was recently refurbished, and it took 4 times that.
We had 3 "Code Victoria's" meaning that that a serious flood had occurred requiring intimidate attention. We later discovered that this was due to busting pipes, due to the ship standing for several months during its impending sale - its 24 years old.
By far our worst problem was noise at night. Not noise of other guests, but and "unexplained noise" from somewhere below our cabin, something like a metal door slamming repeatedly. Despite complaining 5 nights out of the 7 it was never resolved, although they did look. And here is another problem - because no OFFICIAL complaint was recorded despite complaining almost every night, when we raised this on checkout there was only a single record of the issue, despite my partner being on first name terms with the night staff having repeatedly raised the issue at 2, 3, and 4am. It finally resulted in a £100 rebate on our account - at least it paid for our drinks package.