We are a professional couple from Naples, Florida, USA - no kids.
We flew into Heathrow, and took the train down to Dover. We stayed at the Churchill (great location, lackluster hotel), and took a taxi to the ship.
Off to the various ports, liked them all. Weather was perfect. We particularly liked Stockholm. The only tours we took were in St Petersburg (because of the visa situation - this was a bit of a zoo); the rest of the ports we just walked around and took the HOHO buses. That worked very well for us.
Cabin was good size with excellent balcony. Bathroom was good size, bed was comfortable. Everything was to our liking.