Great Experience, all shore excursions included in price. Slower and not as rushed as regular cruises. Not for everyone however, crowd older and much more sedate. Completely casual, food good but not showy or fancey.
Which river cruise did you take? We just returned from the Great Rivers of Europe river cruise by Grand Circle Travel and loved it. The all-included shore excursions were great and the food, although less available and smaller portions, was better than on large cruise ships. No night-life though but we didn't care.