I recently purchased an RO water purifier. The link below describes how I chose my water purifier. I had decided to purchase an RO purifier to replace my Aquaguard UV Water purifier purchased in 1994. I have the new RO water purifier for more than a month now, and have had no issues so far. I will be modifying this page periodically, to share any issues that I encounter and the response that I get from HUL during the days to come.
https://mm-0000-mm.blogspot.com/2012/03/choosing-water-purifier.html