We chose this one because we wanted to visit two of the places on the itinerary. We were not disappointed.
Unfortunately we had not read the brochure properly and had not realised that the first two and last two nights would be in hotels, in Berlin and Prague respectively. However, that was our fault, not Viking's! In the event, we found the experience in Berlin rather dry, but Prague is a lovely city which we will be visiting again.
Also unfortunately, our holiday got off to a very poor start due to a strike of air france staff. We finally go to Berlin eight hours late, after being routed round via Zurich. However, we had informed the London office of our difficulties and we were met by a charming Viking courier and driven to the ship.