Now my bed hangs from the ceiling! I actually do sleep in this thing and spend a fair ammount of time under it as well. When I'm sleeping in it, the top of the mattress is about 110cm off the ground. It does sway back and forth depending on how suddenly I move, but not enough that I find it bothersome. I may be a lot better at lying still than I used to be, though! But really, I have gotten as many good nights sleep in this bed as I've had time for.
And, unlike many of my belongings, if I put it on the ceiling, it stays there.