Will $150,000 Buy You the Best Sleep You've Ever Had?

The Hästens Vividus bed does not come with a guarantee to quiet crying babies. It does not vow Peter Pan-like trips to Never Never Land every night. The tooth fairy does not leave $100 bills under its extraordinarily comfortable pillows—although given its nearly $150,000 price tag, that would be a nice perk.

What it does promise is more in line with the recent wellness science: With a good night's sleep, you live longer, learn faster, function better, stay in better shape, and look younger. For the cost of a high-end Mercedes or a collectible timepiece, you can take a dip in an all-natural fountain of youth every evening. Or so the thinking goes.