Hi friends. I am write a review about Aqua Sure Xpert from Aquaguard . I am using Xpert model from last 2 years and no doubt this is a good product by Aquaguard . The main thing is, it have RO + UV + UF and automatic TDS controller and 8 L water storage capacity. I am fased some problem in starting because of my water pipe line was leaked and when I am complaint for service request the response was so quick and solve my problem. Life of cartridge filters aprox one year or depend on your water usage . Eureka forbes remind you always time to time about product service. I am happy to using this model and no complaint about it.