Sure they were fun while awake for obvious reasons, but over hours of unconscious sleep, the old school water bed was a poor supportive surface for the spine. And getting out of one of these older waterbeds was like a core exercise of frustration; you'd have to swing out your legs first, and then push down to create a wave, then wait for the reflected wave to return to use it springboard out of bed...sometimes with cannonball effects. And darn if it wasn't a pain to fill that bed's bladder using a hose into the bedroom or repair a leak.
But apparently waterbed technology has progressed with new "waveless waterbed" technology, using "hydraulics", also known as "baffles" and "fiber fill". Basically a flotation foam with polyester filaments are used to stabilize the motion normally produced by a liquid bladder, eliminating the unintended motion-in-the-ocean action. These new waterbed manufacturers claim up to a 98% reduction in waves, while retaining the unique water feature. Has anyone tried these new waveless waterbed mattresses? I'm curious what sort of sleeping experience these hybrids waterbeds provide compared to a spring, memory foam or air mattress.