Princess ships offer the line's innovative Personal Choice Cruising program, an individualized, unstructured style of cruising that provides a "what you want, when you want" atmosphere of onboard choice and flexibility designed to give passengers the opportunity to customize their cruise vacation to meet their personal interests, needs and desires. Princess introduced the concept of putting the passengers in control of their own cruise experience in the mid-1990s when it introduced the revolutionary Sun-class ships. This emphasis on choice -- of multiple dining locations, flexible entertainment and affordable private balconies -- has since established customized cruising as the touchstone of new ship design for the entire industry. Princess has also distinguished itself by sailing to more worldwide cruise destinations than any other major line. Offering more than 150 itineraries ranging from seven to 72 days, Princess sails to six continents and calls at nearly 260 ports around the world. Destinations include the Caribbean, Alaska, Panama Canal, Europe, Mexican Riviera, South America, South Pacific, Hawaii/Tahiti, Asia, Canada/New England, Bermuda and world voyages.