MSC Seaside receives mixed reviews, with many guests praising the ship's beautiful design, excellent entertainment, and some standout service staff. However, there are consistent complaints about small cabins, repetitive and bland food, inconsistent service, crowded public areas, and issues with excursions and port times. Pricing is seen as reasonable by some, but many mention extra charges and a la carte pricing. The overall experience is enjoyable for many, but falls short of other cruise lines in key areas like food and customer service.