I HAVE INSTALLED 3 OF THIS PRODUCT. FIRST ONE WAS IN 2006 ANOTHER IN 2007 AND THE LAST ONE IN 2010. ONLY HAD TO REPLACE THE CARTRIDGE ONE TIME AND IT WAS FREE. I LIKE THE PRODUCT.
THE ONLY PROBLEM I HAD AFTER SO MANY YEARS IT STARTED TO BIND AND SQUEAK WHEN I ROTATE FROM LEFT TO RIGHT. A LITTLE LUBRICANT DID THE TRICK.