Regent Seven Seas Mariner receives high praise for its attentive service, luxurious accommodations, and overall cruise experience. Most guests highlight the friendly and professional staff, spacious and clean cabins, and the ship's elegant atmosphere. Food quality receives mixed reviews, with some guests loving the variety and others finding it inconsistent, especially in specialty restaurants. Entertainment and activities are generally well-received, though some found lectures and shows lacking compared to other luxury lines. Excursions and shore experiences are a notable weak point, with several guests citing poor organization and inaccurate descriptions. Internet connectivity is a common complaint, with many expecting better WiFi for the price. Despite some negatives, the majority of guests feel the cruise offers good value and a memorable luxury experience.