It's more fun when you don't have to worry about falling off the bed - it's more more amenable to extremely kinetic activities. This includes at least one double-blindfolded study.
You'd need to do more than blindfold me before I failed to notice that the bed is on the ground...
And if you didn't mean that literally... my own studies show that a GOOD mattress works quite well for double-blindfold studies even with the height of a frame :)
I have often benefited from recommendations for Things I Didn't Know I Wanted.
Given that Less Wrong is a community of unusually intelligent, critical, and self-improvement-focused people, I suspect we can generate a pretty helpful thread of product recommendations — perhaps even a monthly thread of product recommendations.
Rules: