Avalon Seine River cruises receive overwhelmingly positive reviews, with guests praising the attentive service, high-quality food, well-organized excursions, and clean, comfortable accommodations. Most travelers found the experience exceeded their expectations, with many highlighting the professionalism of the crew and the immersive, educational shore tours. While a few guests noted minor issues with specific staff members or aspects of the itinerary, the overall sentiment is that Avalon delivers a first-class river cruise experience.