We departed Amsterdam on June 10 for a Rhine, Main, Danube river cruise. It started off well, but when we reached Regensburg (day 9) we were told the river was low and we would not be able to leave Regensburg. On day 10, we took a bus to Passau (1.5 hours). While there, it was a religious holiday, so many shops were closed, and we were not allowed to hear the organ concert. (Also, we had to take an "optional" excursion previously because the town we docked in did not have any stores open on Sunday-the optional town had open stores-as long as you paid for the bus trip to get there). Anyway, back to our now "bus" tour...we took the bus back to Regensburg, and then found out we would have to take a bus to Vienna (5 hours away). This meant we could only do a short stop in Melk, and we could no longer go to Durnstein. In Vienna, we have had to take numerous bus trips-from our hotel to a far away restaurant for dinner; from downtown to a far away restaurant for lunch, back to the hotel-with no option to go directly back downtown, etc. There has been delayed communication about what is happening next, and the only way we can get the information is if we go to the large group meals in restaurants. This does not give us the opportunity to bypass the long, time wasteful bus rides. Today, we are going to Bratislava, but again, only for a short time. There is not enough time to go to the optional excursion to someone's home, as advertised. The bus rides are long and cramped. The restaurants have been extremely slow, and only some have been good. All in all, this is not what we paid for. Apparently there were similar problems last year-with floods rather than low rivers, but you would think Viking would have figured out how to deal with less than optimal river conditions better.