Overall we felt the service, quality food, great tours, spacious cabins with best shower ever, double sinks, walk-in closet with drawers and shelves (small but all you need) the large counter for computers etc make these ships the best boats on the river.
We were on the Rhône that we have not done before. Loved the tours (best ever) but boats on the Rhône were not parked for an easy stroll into town. We were double parked on some stops but always on the bank side. No walking through another boat. On the Danube you can just walk into town from most boats.
Not sure when but planning on squeeze a group into my schedule at some point in the future.