For the past 12 years I had a normal Aquaguard water purifier installed at my home.
It had a number of limitations like it would remove the basic impurities in water but not all the dissolved salts.
It did not have the mechanism to retain some of the essential minerals that are required by our body, it was bulky and there was no storage capacity which led to transferring the water into a vessel every time and there would be difficulty in the absence of electricity. It took 3 minutes to start and had an annoying noise as well.
For the past 10 months I have been using Kent RO Grand Plus and I am quite happy with the product. It has 8L in-built storage capacity that allows to drink water directly rather than storing it somewhere else and is really helpful in case there is no electricity. It is not that bulky and is easy to mount. The purification is also really good with RO+UV+UF+TDS controller. It also has an auto start and stop option and hence I do not have to worry about switching it on and off. Till now there has been no difficulty and service facility is also really fast and good.
The only thing that I do not like about this product is the transparent view with a lot of complex wiring and filter system.I strongly recommend this product to those who wish to buy a good water purifying system.