Avalon Seine River cruises receive overwhelmingly positive reviews, with guests praising the attentive service, delicious food, well-organized excursions, and clean, comfortable accommodations. Most travelers found the experience exceeded their expectations, highlighting the professionalism of the crew and the immersive nature of the tours. While a few guests noted minor issues with specific staff members or aspects of the itinerary, the vast majority recommend Avalon for a first-class river cruise experience.