This was our first river cruise after several ocean cruises. We chose Crystal because of its reputation and the itinerary (Vienna to Belgrade and back) offered the opportunity to visit cities we otherwise would never get to. Unfortunately, due to the prolonged drought, the itinerary changed to the opposite direction (Passau). Doubly unfortunate was that we were not notified of the change in itinerary until the day before sailing, when we were already in Prague. The crew mentioned that only once since July had the eastern route been possible. We were committed at that point, so chose to continue.
Others have commented on the dining facilities and menu. Waterside is lovely and the service was superb. The standard wines were average and the optional wines seriously overpriced. Choices at breakfast and lunch were varied and very well prepared. Dinner choices were somewhat limited, but excellent.
Others have also mentioned the cabin. We had a "deluxe" suite. When we embarked, I inquired about an upgrade and was told that none of the larger suites was available. We later learned that that wasn't true. After all, from an original passenger list of 145, only 86 actually embarked. The suite we were in was cramped and drawer space totally inadequate. But the bathroom was very nice and the HVAC worked well.
The bed takes up too much space and there is very little storage space. The bathroom is excellent - once you get used to the fact that the toilet seat will automatically raise when you enter.
Very well organized with an excellent guide.
Outstanding tour of the castle with a private visit to a wonderful vista overlooking the city