Richard,
I was on a Peter Deilmann cruise last fall (the Mozart) from Passau to Passau round trip on the Danube. The ports were Vienna, Budapest, Bratislava,Durnstein,Melk and Grein. It was a beautiful trip and the river boat was very nice. The cabin was roomy as was the bathroom except that it had only a small shower. The food was excellent. Of course it isn't all inclusive like Raddisson! And I believe it is assigned seating for all meals. I am not sure because I was with a group and we took at least four tables and we moved around within our group. This was actually part of a larger trip with a pre-cruise in Prague and post cruise in Salsburg and Munich. The travel agent was a fairly large agency in L.A. and they do at least one of these trips each year as golfing trips (I don't golf but my friends do) so they are very familiar with most of the river boats. The owner of the agency was on our trip last year with us. If you email me I can give you the name of the agency.