We chose this cruise with Viking because we count on them to overcome obstacles like port changes due to low water levels and still have an amazing experience. We enjoyed the people we sailed with who were all there because they wanted to see the Passion Play. The Passion Play was a once-in-a-lifetime experience and we had great seats in the lower third of the theater. We could see everything! The support staff was wonderful and our guides went out of their way to help us even when our port changes made things challenging. We made new friends and had a wonderful time. Our cabin was beautiful and very comfortable. The evening programs in the lounge were a lot of fun, especially the waltz lessons in Vienna and the chef demonstration of making apple strudel.This was our second river cruise with Viking and we plan to try an ocean cruise with them, soon.