let's just hope the showerhead doesn't actually shoot pennies at you. Spending the day covered in welts and smelling like, well, pennies would suck.
In one of my past lives I worked in a spa where we had a therapeutic vichy shower which is pretty much what this is, but I've never thought of installing one in a home, because really, who has room? if you've never taken a shower lying down (and too hungover to stand up in your own shower doesn't count) you're missing out. It's incredibly relaxing.