This was a "quickie" cruise to nowhere, called a Comedy Cruise. We were not really prepared for the P&O activities. It is less formal but the website is somewhat lacking about what to expect.
Being somewhat disabled has potential problems - but not this time. Non-disabled partner made frequent use of the gym. Apparently the facilities were A-OK.
White Bay Cruise terminal is not ideal for public transport but a taxi from the airport to the terminal for two is about the same cost as train and ferry and less hassle.
Nothing extra-ordinary - only thing missing was a view outside and the strange feeling of being lost finding an internal cabin (being used to external facing cabins)