I love them.
You will go through a lot of soap but this brand is the one to buy.<br />I discovered the first one about 40 years ago when a hotel guest put it into the washing machine.  DON'T DO THAT!  It ended up wound around the base of the inner tub and one end stopped the pump.<br />This one rinses out clean in seconds so it never needs to leave the shower until it is worn out.  I usually get about 2000 showers or 5 years out of one. Where I live these are for sale in most stores that stock bath tools, but the convenience of  Amazon makes that trip unnecessary.
Rating: 5 stars