What are P&O like?

A while back I wrote a post titled What are MSC Like? You can read it by clicking the words in bold. It was an introduction for first time cruisers as to what they could expect from an MSC cruise. One of my regular readers, whom I was talking to the other day, suggested it might be handy if I started a series of posts just introducing the other cruise lines to help first time cruisers make up their mind about the suitability of different cruises and what they offer. I've decided to kick the series of with the cruise line P&O.