This 2,600-guest ship may have been launched in 1998, making it the oldest in the Princess Cruises fleet, but it has been upgraded (the last refresh was in 2019) and continues to offer a classy, low-key cruise for all ages. The decor on Grand Princess is pleasant although hardly cutting-edge and the dining and entertainment options tend towards the traditional — Italian classics at Sabatini’s and steaks at Crown Grill, along with retro song-and-dance revues and piano singalongs at Crooners. For many, therein lies the appeal.