Hated it, youngest couple by at least 20 years and we were close to 50. No days at sea (Mediterranean) but not nice, grannies and grandpas going to the bar in their swimming stuff. Went to the restaurants each night rather than the buffet, to avoid the clamour, the food and drinks were excellent.
Only positive to come out of it was to see so many countries in two weeks and gave us tasters for places we'll aim to go back to for a longer time. Dubrovnik being one.
Seriously unlikely I'll go on another until my 70's at least.