Nice. No dirty basin to wash your hands into.  Instead, the water falls onto a clean stone slab, rolls off the sides and disappears inbetween the large stones before discretely going down the drain.  But.  Does this mean there’s bits of human dirt congregating around the stones?  Caught underneath them, festering away breeding germs?  Yeuch.  And how do you clean it all?  Do you pick up all the stones and rub the slime off them?  But, hey, nice idea for those who don’t involve themselves in the trivia of cleaning, and don’t mind catching some disease from the stone-slime.