Avalon river cruises receive overwhelmingly positive reviews for their exceptional service, comfortable and clean accommodations, high-quality food, and well-organized excursions. Passengers consistently praise the professionalism and friendliness of the crew, the intimate and relaxed atmosphere on board, and the memorable itineraries. While a few guests noted areas for improvement such as food variety, excursion group sizes, and internet connectivity, the overall sentiment is that Avalon delivers a top-notch river cruising experience.