When I shifted to a place near Kota, I found the water to be not clean and pure. We decided to buy a RO. We bought a Eureka Forbes RO, which was light in weight and portable. One of the technician came to gave us demo and then installed it in our kitchen. I remember the water we used to get was clean and do not had so much complexity to fill as the water would automatically fill in it.
However, the problem started after 4 months when the water does not get clean or purified. The sales representative came and checked that the container was filled with the impure water called, Khaar and so it is blocking the way of the purifier. It had to be replaced costing Rs 500. Therefore, every 4 months we had to do so costing us Rs 500 each time. Later on, we stopped using it, as it was a hefty deal for us.