Speaking specifically to Viking ocean cruises, we’ve taken two:
Empires of the Mediterranean, Venice to Athens, 10 days, 5 countries: Italy, Slovenia, Croatia, Montenegro, and Greece.
In Search of Northern Lights, 13 days, 3 countries: Norway, Netherlands, UK. However, we disembarked in Amsterdam, and didn’t go on to London. Also, as you’ll see in the link, the current version of this cruise is London to Edinburgh and then several Norwegian ports.
We were completely enthralled by our first cruise, which we extended on both ends: four extra days in Florence and Venice on our own before boarding, and a four-day Viking extension in Athens. Despite broiling heat in August (the only time my wife could go before she retired), virtually everything about the trip was fantastic.
The on-board experience is lovely. Unlike other cruise lines, all Viking ocean ships are essentially identical. Their interior decor is typically Scandinavian: simple, clean, and elegant. Fewer than 1,000 passengers, no one under 18 years old, and no casinos. The cabins are spacious, even the smaller ones. (Our NCL cabin was quite cramped in comparison.)
The food is fantastic in all the restaurants. Dining in the main restaurants is open, although you need reservations in the two specialty restaurants, Manfredi’s and Chef’s Table. Your cabin level grants you a certain number of meals in the specialty restaurants.
The ship has live music throughout the day: string ensembles, guitarists, piano, and offers a nice tea service at 4 pm in the Wintergarden, adjacent to the Main Pool. “Decadent finger sandwiches, scones and desserts are accompanied by international teas, tea ceremony demonstrations and relaxing classical music from the Viking Resident Musicians.” This was one of my wife’s favorite things!
The enrichment I spoke of in the other thread consisted primarily of port talks and lectures by experts. The port talks covered the history of the port city and surrounding area, as well as descriptions of the various excursions the ship offered. The lectures usually covered the history of the areas we were visiting or other subjects of interest. For example, on the Northern Lights cruise, we had a lecture on how best to photograph the aurorae.
The lecturers were noted experts in their fields. I recognized the historian on the Mediterranean cruise as someone I had seen on PBS or BBC documentaries. All were quite approachable and friendly. One of the highlights of that cruise was sitting with that historian at breakfast one morning and discussing aspects of the talk he had given the night before.
Of course, Viking also offers educational shore excursions to historic sites, museums, etc., in addition to more touristy sight-seeing trips, but as others have mentioned above, you can usually book similar excursions with local tour guides for much lower cost.
The only exceptions are when the ship has bought out a particular option. For instance, on the Northern Lights trip, if you wanted to stay overnight in the ice hotel, all the rooms had been booked by the ship, so you had to pay their marked-up rates. Likewise, there was a train excursion that the ship had bought out. (As it happened, we didn’t get to those ports, so the issue was moot.)
One aspect of Viking that we particularly appreciated was that on every Friday night of our cruises, the ship offered a meeting place for Jewish guests to celebrate Shabbat, and provided wine and challah. No charge. (I didn’t even bother to find out whether NCL did the same.)
We will be taking our first Viking river cruise in December: Pharaohs & Pyramids, 12 days with a four-day pre-cruise visit to Istanbul. Even before the war in Iran, I was concerned about the issue of security when visiting Egypt, but the war seems not to have changed the safety of tourism in Egypt. Hopefully, nothing will change between now and December.
My attitude about going to Egypt changed when I learned that on this cruise Viking basically keeps you in its own security bubble. All excursions are included and handled by Viking. You don’t need to venture out into potentially dangerous place on your own. It’s one of my wife’s bucket-list trips. We’re looking forward to it.