Avalon Waterways receives overwhelmingly positive reviews for its river cruises, with guests praising the attentive service, comfortable accommodations, and well-organized excursions. The staff is frequently described as professional and friendly, and many travelers felt their expectations were exceeded. While most guests enjoyed the food and ship amenities, a few noted issues with air conditioning during hot weather and some found the food portions or options lacking. Overall, Avalon is highly recommended for a memorable and enjoyable river cruise experience.