I using the Kent grand RO last 3 year continued but worry about the repair cost because after 3 month my RO always stop their working so that we called the RO representatives and he changed the internal wiring and always told that the wired is damaged and always charged 300 to 400 for this frist tow and three time he changed the filter also set a external filter to the way where water incoming in the filter. So I want to share the company to improve their wiring system for help the customer and free for the repair cost.