Just returned from a two-week Med cruise on Navigator of the Seas.
Most cruise reviews inevitably are built around comparisons with previous cruises, and we are certainly not seasoned cruise-goers, but we did a similar Med cruise at the same time last year on P&O's Ventura so most of the comments will be in comparison with that one, although whether the observations reflect differences between the two companies or between the two ships I'm not sure.
Overall our family (myself, my partner, and our 13-yr-old son) enjoyed our experience, but there was certainly room for improvement.