Waterbeds have some very noticable affects and benefits for uncomfortable conditions and illnesses, but they can also significantly impact quality of sleep through minor changes. Innapropriate posture, dusty bedding and cold sleeping conditions are just some small elements of a regular spring-mattress that can stop you getting a good nights sleep.
By changing these small factors, a waterbed can provide the solution to problems from aching joints to insomnia and fatique. For more information on some of the specific benefits a waterbed can provide, click on the following links:

Allergy Relief
Backache Relief
Relief from Bed Sores and Arthritis