Avalon Waterways receives overwhelmingly positive reviews for its river cruises, with guests praising the attentive service, delicious food, comfortable accommodations, and well-organized excursions. Many reviewers describe their trips as exceeding expectations and highlight the professionalism of the staff. While most experiences were excellent, a few guests noted issues with air conditioning during hot weather and some dissatisfaction with food variety and tour pacing. Overall, Avalon is highly recommended for a memorable river cruise experience.