Please note, however, that most of these services are offered for a nominal fee with the exception of the ship's daily newsletter with headlining newsbriefs. Tipping is a matter of individual preference. Other shipboard personnel can be tipped for special services at your discretion. Almost all cruise ships have laundry facilities and a great many provide dry-cleaning services. There is, however, an additional charge for professional laundry and dry-cleaning services.
Most ships also have self-service launderettes.
The most popular cruise areas boast some of the calmest waters in the world. In addition, stabilizers on modern ships, advance availability of accurate weather information, and development of effective preventative medications have, for the most part, eliminated the incidence of motion discomfort. Beyond that, it's hard to find any negatives. After all, you don't have to run to make plane connections to get from one port to the next. You don't have the hassles of making dinner or nightclub reservations.