I had puchased kent RO grand plus in march 16 till now its working not a big problem faced but quality of water is changing day by day. I have not a big issue with yhe product but I have a strong issue with there services.at the time of purchesing and installing both person told that after 3 months our enginerrs will come and servecing it there end and I thing if I not forged then its free for an year. But from last one months I have called 2 times on its service center but till now no has visited the place.