re: viking river cruise Danuabe River

enjoyable, I would have liked to spend maybe one more day in Vienna and maybe one less day in Germany. The vessel is easy to get around, we chose a room with a small balcony so not to feel as confined. The tour excursions and things to do you can stay in your room as much or as little as you prefer.
I would do a variation of the trip in the future (different river) - there are so many options available as extending the trip on the front end or the back end. We met numerous couples that have toured with Viking on numerous occasions that they do a good job.