Crystal ships are large, unlike other luxury ships and carry 900 plus passengers.
What sets Crystal apart from the other luxury lines is their superior service, a large variety of dining options, larger staterooms and some of the highest ratios of space per passenger.
The ship designs are based on the principles of feng shui, the eastern art of arranging your surroundings to attract positive energy.
Before sailing, passengers will receive a personal email address so family and friends can keep in touch.
Each ship has complimentary self service laundry rooms that come in handy on the longer itineraries.
Although the ships are older, they've been kept "shiny and new" with multimillion-dollar renovations.
Gratuities are included in your cruise fare.
The median age of the passengers who sail on Crystal is 50. Crystal attracts sophisticated world travelers who want great food and service. Longer cruises tend to attract older guests.
Plan to spend extra for shore excursions and other temptations. Some passengers complain, for example, that there's a charge if you dine at Silk Road more than once, and that wine and liquor are often upsold.
Smoking is allowed in cabins and in designated areas of public rooms and decks.