This is an brilliant water purifier by Panasonic and I am using it from last 2 months, but it has very bad after sales installation and service.the person who came during the time of installation, had zero knowledge about the water purifier.firstly he told me that the membrane which came with the purifier is an spare and he installed the purifier without the membrane.he doesn't even had an TDS meter.when I checked the TDs with my own TDs meter, it reads the same as that of the inlet water.then after looking at the drawing given by the company, I guided the service person for installation.for this pathetic service I had paid an installation charge of Rs 1000.thus this is the first time I had to pay any charges for any new devices.but the products works really good.