Avalon river cruises receive overwhelmingly positive reviews for their exceptional service, comfortable and clean ships, engaging excursions, and friendly staff. Many guests highlight the professionalism and warmth of the crew, the quality of accommodations, and the memorable experiences both onboard and during excursions. While most aspects are praised, some guests note areas for improvement such as food quality, WiFi connectivity, and certain excursions. Overall, Avalon is highly recommended, with many guests eager to cruise with them again.