traveled as a single with another couple. The food was great, the tours were great, the size of the ship was great. The crew was friendly and efficient, My only issue was that as a single person who had paid double I had hoped to find other single on the cruise but did not,as a result iI did feel awkward and I am sure that it did flavour my enjoyment of the trip.
The included airfare was very difficult to manage as a single, I was initially booked with my friends on both flights to and from Europe but 2 weeks before the flight was to have left Vanguards airfare department put on different flights, we had to cancel those flights at a group rate and replace them with higher priced tickets in order to travel together.
I supposed that had I been a seasoned traveler I might have decided to take a different trip.
all in all it is a nice trip for a couple but not that comfortable for someone traveling solo, at least not for me as a widower. The educational presentations and tours I would recommend.