Staff were well trained and had a great attitude to assist us for any and every thing we needed. Cruise Director was excellent in every way, great knowledge, and could roll with the punches as situations changed. Food was very very good, generous servings and imaginative. There were some guests who left because they tested positive, but it was very low-key and not discussed. We were still in the periods where daily spit tests were required. Our Pre-Extension was terrific in Lucerne and the Post-Extension in Amsterdam was also good. The Pre- and Post- hotels were in the middle of the city and provided great access to all the activities and sight seeing we wanted, mostly on our own. Viking really knows how to treat a guest...from arrival at the airport to checking in the Pre-extension hotel they handled all the bags, and made arrangement for special requests. I cannot praise Viking enough for an excellent cruise.