We chose this cruise as we had never traveled Europe outside of London and Paris. A river cruise allows one to not change rooms, but change venue everyday. We purchased the packaged tours at every stop and they were professionally run with top notch knowledge, plenty of free time and eating recommendations. We loved the on boat activities as well as just the leisure time. Budapest to Passau, we will be booking another one on the Rhine in the future.
Favorite sites stops were Nuremburg trials, city shopping, and Salzburg. We also enjoyed a ballet and musical performance in Vienna with great talent in both dance and voice by the performers. It was also fascinating to just sit up on the deck and enjoy the breeze and see the homes and castles and town squares that passed by us as we made our way up the river to our destination.