Explorer of the Seas receives generally positive reviews for its service, food, and overall cruise experience, with many guests praising the staff's friendliness and the ship's cleanliness. However, there are notable criticisms regarding the ship's age, occasional poor entertainment, inconsistent food quality, and issues with water quality in some cabins. Crowding and high prices for extras like internet and excursions are also mentioned. While many guests had a wonderful time and would cruise again, others felt the ship needs refurbishment and that some aspects, such as entertainment and specialty dining, could be improved.