Regent Seven Seas Mariner receives high praise for its attentive service, luxurious accommodations, and overall cruise experience. Guests consistently highlight the professionalism and friendliness of the staff, the comfort and cleanliness of the ship, and the quality of the excursions. While most reviews are positive, some guests note inconsistencies in food quality, issues with shore excursions, and occasional maintenance or connectivity problems. Overall, the ship is regarded as a top-tier luxury cruise experience, though some areas could benefit from improvement.