Beautiful ship and amazing crew. The tours were informative and interesting. The food was superb. I have nothing but good things to say about Viking. In addition, the other passengers were friendly and interesting. The entertainment provided was geared to the region we were cruising so it was not only entertaining but educational. The only suggestion I would make would be to provide tours that were a bit easier for older or disabled travelers. While a tour was billed as. "easy", I'm not sure by what yardstick this was measured. Several travelers had difficulty walking long distances and especially over cobblestones and up inclines. Perhaps a total riding tour could be provided for the travelers who are not physically able to complete one of these tours. I think this would attract more folks to the river cruises. So many people would like to take the cruises if the tours were less trying for them.