Many of the lower-priced cruise lines use older vessels that have been renovated. When considering a ship, check into the cruise line. A good reputation is vital to keep any ship, new or old, sailing smoothly. Larger ships offer more shops, bigger public rooms, and more activities. They also have more passengers and may seem less intimate.
Smaller ships offer a more intimate, less crowded cruise but can be very expensive.
Some of the luxury ships offer private dining, orchestras, and all-suite cabins. Keep in mind that pools, public areas, and facilities are scaled to the ship's size. Your destination may be a factor in selecting ship size. For example, some of the newer ships are too large to fit through the Panama Canal. Less popular destinations are served by smaller ships.