Basically the bed fully supports all of your body weight by attaching to subway ventilation grating. And to prove that it works, some poor guy got assigned to the task of taking 40 minute naps in the middle of New York. Since he didn't get mugged or fall over, this could be considered a successful trial.
The Vertical bed comes complete with noise-cancelling headphones, opaque sunglasses, a free standing umbrella, and fits into a suitcase. No idea when we'll be able to buy one, but I'll be wishing I already had it while waiting in line.