Waterbeds
 

Does anyone actually use them anymore? And if so, how well do you sleep?

Just bought a Sleep Number. Probably the single most rewarding purchase as an adult.

They seemed like a fad in the late 80s/early 90s in the UK, I don't know of anyone who has one but I bet they'll come back around soon :)

From a sleeping point of view, their horrible for your spine alignment etc. My girlfriend and I are going to replace our old temperpedic with a new mattress. You spend 1/3rd of your life in bed, might as well get a good one am I right ? heh