[Lady Jag]

Don't talk about knees, both of mine are smashed and arthritic. If it weren't for the waterbeds I've had over the last 30 years I'd barely be able to walk. Pregnant women have slept on their stomachs full term. A friend of mine quit an 8 Percocet/day habit two weeks after he bought a waterbed (accident victim). People I know who buy them, keep them because they are orthopedic heaven. Trust me.

[Soaring Feather]

I have slept on them a few times, but did not especially like them. Really, I could not get out of the bed.

I have a very firm mattress. I need that as I do have chronic lower back pain as well as two missing disks. I have nerve damage in my left leg caused by a herniated disk resting on the sciatic nerve, too long.
Outside of my leg and foot are numb permanently.

[StarCMC]

Pregnant women have slept on their stomachs full term.

I can attest to that one!!! :o) Love my waterbed!